21977379130 has 16 divisors (see below), whose sum is σ = 45210608640. Its totient is φ = 7535101392.

The previous prime is 21977379091. The next prime is 21977379131. The reversal of 21977379130 is 3197377912.

It is not an unprimeable number, because it can be changed into a prime (21977379131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156981210 + ... + 156981349.

It is an arithmetic number, because the mean of its divisors is an integer number (2825663040).

Almost surely, 2^21977379130 is an apocalyptic number.

21977379130 is an abundant number, since it is smaller than the sum of its proper divisors (23233229510).

21977379130 is a wasteful number, since it uses less digits than its factorization.

21977379130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313962573.

The product of its (nonzero) digits is 500094, while the sum is 49.

The spelling of 21977379130 in words is "twenty-one billion, nine hundred seventy-seven million, three hundred seventy-nine thousand, one hundred thirty".