1959622020 has 36 divisors (see below), whose sum is σ = 5944187340. Its totient is φ = 522565824.

The previous prime is 1959622013. The next prime is 1959622039. The reversal of 1959622020 is 202269591.

It is a happy number.

1959622020 is a `hidden beast` number, since 1 + 9 + 5 + 9 + 622 + 0 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1164720384 + 794901636 = 34128^2 + 28194^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1959622020³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5443215 + ... + 5443574.

It is an arithmetic number, because the mean of its divisors is an integer number (165116315).

Almost surely, 2^1959622020 is an apocalyptic number.

1959622020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1959622020 is an abundant number, since it is smaller than the sum of its proper divisors (3984565320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1959622020 is a wasteful number, since it uses less digits than its factorization.

1959622020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886804 (or 10886799 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1959622020 is about 44267.6181875646. The cubic root of 1959622020 is about 1251.3844969018.

It can be divided in two parts, 19596 and 22020, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 1959622020 in words is "one billion, nine hundred fifty-nine million, six hundred twenty-two thousand, twenty".