21115667130 has 64 divisors (see below), whose sum is σ = 51239260800. Its totient is φ = 5568528384.

The previous prime is 21115667129. The next prime is 21115667141. The reversal of 21115667130 is 3176651112.

It is a junction number, because it is equal to n+sod(n) for n = 21115667091 and 21115667100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6106362 + ... + 6109818.

It is an arithmetic number, because the mean of its divisors is an integer number (800613450).

Almost surely, 2^21115667130 is an apocalyptic number.

21115667130 is an abundant number, since it is smaller than the sum of its proper divisors (30123593670).

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

21115667130 is a wasteful number, since it uses less digits than its factorization.

21115667130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663.

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 21115667130 in words is "twenty-one billion, one hundred fifteen million, six hundred sixty-seven thousand, one hundred thirty".