20597391600 has 60 divisors (see below), whose sum is σ = 65980314936. Its totient is φ = 5492637440.

The previous prime is 20597391553. The next prime is 20597391623. The reversal of 20597391600 is 619379502.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8581047 + ... + 8583446.

Almost surely, 2^20597391600 is an apocalyptic number.

20597391600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20597391600 is an abundant number, since it is smaller than the sum of its proper divisors (45382923336).

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

20597391600 is a wasteful number, since it uses less digits than its factorization.

20597391600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17164514 (or 17164503 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 20597391600 in words is "twenty billion, five hundred ninety-seven million, three hundred ninety-one thousand, six hundred".