20508858724 has 12 divisors (see below), whose sum is σ = 35892520048. Its totient is φ = 10253853000.

The previous prime is 20508858631. The next prime is 20508858751. The reversal of 20508858724 is 42785880502.

It is a super-2 number, since 2×20508858724² (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, 58362 + ... + 210769.

Almost surely, 2^20508858724 is an apocalyptic number.

It is an amenable number.

20508858724 is a deficient number, since it is larger than the sum of its proper divisors (15383661324).

20508858724 is a wasteful number, since it uses less digits than its factorization.

20508858724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288186 (or 288184 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 20508858724 in words is "twenty billion, five hundred eight million, eight hundred fifty-eight thousand, seven hundred twenty-four".