1920868520 has 32 divisors (see below), whose sum is σ = 4324929120. Its totient is φ = 767818560.

The previous prime is 1920868519. The next prime is 1920868549. The reversal of 1920868520 is 258680291.

It is a super-2 number, since 2×1920868520² = 7379471742253980800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45155 + ... + 76685.

It is an arithmetic number, because the mean of its divisors is an integer number (135154035).

Almost surely, 2^1920868520 is an apocalyptic number.

1920868520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920868520 is an abundant number, since it is smaller than the sum of its proper divisors (2404060600).

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

1920868520 is a wasteful number, since it uses less digits than its factorization.

1920868520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33065 (or 33061 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1920868520 is about 43827.7140631359. The cubic root of 1920868520 is about 1243.0803834063.

The spelling of 1920868520 in words is "one billion, nine hundred twenty million, eight hundred sixty-eight thousand, five hundred twenty".