21677803194 has 32 divisors (see below), whose sum is σ = 45794985984. Its totient is φ = 6830213040.

The previous prime is 21677803193. The next prime is 21677803211. The reversal of 21677803194 is 49130877612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21677803193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1347204 + ... + 1363199.

It is an arithmetic number, because the mean of its divisors is an integer number (1431093312).

Almost surely, 2^21677803194 is an apocalyptic number.

21677803194 is an abundant number, since it is smaller than the sum of its proper divisors (24117182790).

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

21677803194 is a wasteful number, since it uses less digits than its factorization.

21677803194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710482.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 21677803194 in words is "twenty-one billion, six hundred seventy-seven million, eight hundred three thousand, one hundred ninety-four".