20909600496 has 200 divisors, whose sum is σ = 63020581008. Its totient is φ = 6687360000.

The previous prime is 20909600429. The next prime is 20909600513. The reversal of 20909600496 is 69400690902.

It is a super-2 number, since 2×20909600496² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3238071 + ... + 3244521.

Almost surely, 2^20909600496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20909600496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31510290504).

20909600496 is an abundant number, since it is smaller than the sum of its proper divisors (42110980512).

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

20909600496 is a wasteful number, since it uses less digits than its factorization.

20909600496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573 (or 6558 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 20909600496 in words is "twenty billion, nine hundred nine million, six hundred thousand, four hundred ninety-six".