21964524654 has 16 divisors (see below), whose sum is σ = 46513111248. Its totient is φ = 6890831232.

The previous prime is 21964524649. The next prime is 21964524691. The reversal of 21964524654 is 45642546912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107669137 + ... + 107669340.

It is an arithmetic number, because the mean of its divisors is an integer number (2907069453).

Almost surely, 2^21964524654 is an apocalyptic number.

21964524654 is an abundant number, since it is smaller than the sum of its proper divisors (24548586594).

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

21964524654 is a wasteful number, since it uses less digits than its factorization.

21964524654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215338499.

The product of its digits is 2073600, while the sum is 48.

The spelling of 21964524654 in words is "twenty-one billion, nine hundred sixty-four million, five hundred twenty-four thousand, six hundred fifty-four".