20355665196 has 24 divisors (see below), whose sum is σ = 47507448240. Its totient is φ = 6783665152.

The previous prime is 20355665179. The next prime is 20355665201. The reversal of 20355665196 is 69156655302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139461 + ... + 245276.

It is an arithmetic number, because the mean of its divisors is an integer number (1979477010).

Almost surely, 2^20355665196 is an apocalyptic number.

It is an amenable number.

20355665196 is an abundant number, since it is smaller than the sum of its proper divisors (27151783044).

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

20355665196 is a wasteful number, since it uses less digits than its factorization.

20355665196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389153 (or 389151 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 20355665196 in words is "twenty billion, three hundred fifty-five million, six hundred sixty-five thousand, one hundred ninety-six".