511162020 has 36 divisors (see below), whose sum is σ = 1550525340. Its totient is φ = 136309824.

The previous prime is 511161991. The next prime is 511162021. The reversal of 511162020 is 20261115.

It can be written as a sum of positive squares in 2 ways, for example, as 154405476 + 356756544 = 12426^2 + 18888^2 .

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

It is a super-2 number, since 2×511162020² = 522573221380960800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 511161984 and 511162002.

It is not an unprimeable number, because it can be changed into a prime (511162021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1419715 + ... + 1420074.

Almost surely, 2^511162020 is an apocalyptic number.

It is an amenable number.

511162020 is an abundant number, since it is smaller than the sum of its proper divisors (1039363320).

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

511162020 is a wasteful number, since it uses less digits than its factorization.

511162020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839804 (or 2839799 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 511162020 is about 22608.8924983069. The cubic root of 511162020 is about 799.5633137581.

The spelling of 511162020 in words is "five hundred eleven million, one hundred sixty-two thousand, twenty".