21613552614 has 24 divisors (see below), whose sum is σ = 47488935312. Its totient is φ = 7103045040.

The previous prime is 21613552613. The next prime is 21613552643. The reversal of 21613552614 is 41625531612.

21613552614 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 35 + 5 + 2 + 614 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21613552613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8454729 + ... + 8457284.

It is an arithmetic number, because the mean of its divisors is an integer number (1978705638).

Almost surely, 2^21613552614 is an apocalyptic number.

21613552614 is an abundant number, since it is smaller than the sum of its proper divisors (25875382698).

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

21613552614 is a wasteful number, since it uses less digits than its factorization.

21613552614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16912092 (or 16912089 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 21613552614 in words is "twenty-one billion, six hundred thirteen million, five hundred fifty-two thousand, six hundred fourteen".