1986920020 has 12 divisors (see below), whose sum is σ = 4172532084. Its totient is φ = 794768000.

The previous prime is 1986920011. The next prime is 1986920083. The reversal of 1986920020 is 200296891.

It can be written as a sum of positive squares in 2 ways, for example, as 1340438544 + 646481476 = 36612^2 + 25426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49672981 + ... + 49673020.

It is an arithmetic number, because the mean of its divisors is an integer number (347711007).

Almost surely, 2^1986920020 is an apocalyptic number.

1986920020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1986920020 is an abundant number, since it is smaller than the sum of its proper divisors (2185612064).

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

1986920020 is a wasteful number, since it uses less digits than its factorization.

1986920020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99346010 (or 99346008 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1986920020 is about 44574.8810430269. The cubic root of 1986920020 is about 1257.1684167250.

The spelling of 1986920020 in words is "one billion, nine hundred eighty-six million, nine hundred twenty thousand, twenty".