21915637134 has 32 divisors (see below), whose sum is σ = 46283806080. Its totient is φ = 6898884192.

The previous prime is 21915637103. The next prime is 21915637151. The reversal of 21915637134 is 43173651912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267084 + ... + 339359.

It is an arithmetic number, because the mean of its divisors is an integer number (1446368940).

Almost surely, 2^21915637134 is an apocalyptic number.

21915637134 is an abundant number, since it is smaller than the sum of its proper divisors (24368168946).

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

21915637134 is a wasteful number, since it uses less digits than its factorization.

21915637134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606784.

The product of its digits is 136080, while the sum is 42.

The spelling of 21915637134 in words is "twenty-one billion, nine hundred fifteen million, six hundred thirty-seven thousand, one hundred thirty-four".