20596988400 has 120 divisors (see below), whose sum is σ = 66035599344. Its totient is φ = 5487820800.

The previous prime is 20596988369. The next prime is 20596988417. The reversal of 20596988400 is 488969502.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×20596988400² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1525680 + ... + 1539120.

Almost surely, 2^20596988400 is an apocalyptic number.

20596988400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20596988400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33017799672).

20596988400 is an abundant number, since it is smaller than the sum of its proper divisors (45438610944).

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

20596988400 is a wasteful number, since it uses less digits than its factorization.

20596988400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14739 (or 14728 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 20596988400 in words is "twenty billion, five hundred ninety-six million, nine hundred eighty-eight thousand, four hundred".