20516525264 has 20 divisors (see below), whose sum is σ = 39779224800. Its totient is φ = 10250918880.

The previous prime is 20516525231. The next prime is 20516525273. The reversal of 20516525264 is 46252561502.

It is a happy number.

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, 435902 + ... + 480669.

It is an arithmetic number, because the mean of its divisors is an integer number (1988961240).

Almost surely, 2^20516525264 is an apocalyptic number.

It is an amenable number.

20516525264 is a deficient number, since it is larger than the sum of its proper divisors (19262699536).

20516525264 is a wasteful number, since it uses less digits than its factorization.

20516525264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917978 (or 917972 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 20516525264 in words is "twenty billion, five hundred sixteen million, five hundred twenty-five thousand, two hundred sixty-four".