20897012496 has 40 divisors (see below), whose sum is σ = 53990901504. Its totient is φ = 6964773760.

The previous prime is 20897012491. The next prime is 20897012501. The reversal of 20897012496 is 69421079802.

It is an interprime number because it is at equal distance from previous prime (20897012491) and next prime (20897012501).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20897012491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423550 + ... + 470306.

Almost surely, 2^20897012496 is an apocalyptic number.

It is an amenable number.

20897012496 is an abundant number, since it is smaller than the sum of its proper divisors (33093889008).

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

20897012496 is a wasteful number, since it uses less digits than its factorization.

20897012496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56079 (or 56073 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 20897012496 in words is "twenty billion, eight hundred ninety-seven million, twelve thousand, four hundred ninety-six".