20910550504 has 16 divisors (see below), whose sum is σ = 39348828900. Its totient is φ = 10417529472.

The previous prime is 20910550489. The next prime is 20910550541. The reversal of 20910550504 is 40505501902.

It can be written as a sum of positive squares in 2 ways, for example, as 20600860900 + 309689604 = 143530^2 + 17598^2 .

It is a super-2 number, since 2×20910550504² (a number of 21 digits) contains 22 as substring.

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, 4715869 + ... + 4720300.

Almost surely, 2^20910550504 is an apocalyptic number.

It is an amenable number.

20910550504 is a deficient number, since it is larger than the sum of its proper divisors (18438278396).

20910550504 is a wasteful number, since it uses less digits than its factorization.

20910550504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436452 (or 9436448 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 20910550504 in words is "twenty billion, nine hundred ten million, five hundred fifty thousand, five hundred four".