20415499968 has 28 divisors (see below), whose sum is σ = 54016010840. Its totient is φ = 6805166592.

The previous prime is 20415499931. The next prime is 20415499969. The reversal of 20415499968 is 86999451402.

It is not an unprimeable number, because it can be changed into a prime (20415499969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53165173 + ... + 53165556.

Almost surely, 2^20415499968 is an apocalyptic number.

It is an amenable number.

20415499968 is an abundant number, since it is smaller than the sum of its proper divisors (33600510872).

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

20415499968 is a wasteful number, since it uses less digits than its factorization.

20415499968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106330744 (or 106330734 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 20415499968 in words is "twenty billion, four hundred fifteen million, four hundred ninety-nine thousand, nine hundred sixty-eight".