20015074520 has 64 divisors (see below), whose sum is σ = 52858370880. Its totient is φ = 6676839936.

The previous prime is 20015074459. The next prime is 20015074531. The reversal of 20015074520 is 2547051002.

It is a self number, because there is not a number n which added to its sum of digits gives 20015074520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955619 + ... + 976338.

It is an arithmetic number, because the mean of its divisors is an integer number (825912045).

Almost surely, 2^20015074520 is an apocalyptic number.

20015074520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20015074520 is an abundant number, since it is smaller than the sum of its proper divisors (32843296360).

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

20015074520 is a wasteful number, since it uses less digits than its factorization.

20015074520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932012 (or 1932008 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The spelling of 20015074520 in words is "twenty billion, fifteen million, seventy-four thousand, five hundred twenty".