20051516525 has 12 divisors (see below), whose sum is σ = 26172506400. Its totient is φ = 15196938480.

The previous prime is 20051516509. The next prime is 20051516533. The reversal of 20051516525 is 52561515002.

It is not a de Polignac number, because 20051516525 - 2⁴ = 20051516509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20051516491 and 20051516500.

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 11 ways as a sum of consecutive naturals, for example, 21106385 + ... + 21107334.

It is an arithmetic number, because the mean of its divisors is an integer number (2181042200).

Almost surely, 2^20051516525 is an apocalyptic number.

20051516525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20051516525 is a deficient number, since it is larger than the sum of its proper divisors (6120989875).

20051516525 is a wasteful number, since it uses less digits than its factorization.

20051516525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42213748 (or 42213743 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 20051516525 in words is "twenty billion, fifty-one million, five hundred sixteen thousand, five hundred twenty-five".