21465918126 has 24 divisors (see below), whose sum is σ = 46518785040. Its totient is φ = 7153875936.

The previous prime is 21465918107. The next prime is 21465918137. The reversal of 21465918126 is 62181956412.

21465918126 is a `hidden beast` number, since 2 + 1 + 46 + 591 + 8 + 12 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24586 + ... + 208653.

It is an arithmetic number, because the mean of its divisors is an integer number (1938282710).

Almost surely, 2^21465918126 is an apocalyptic number.

21465918126 is an abundant number, since it is smaller than the sum of its proper divisors (25052866914).

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

21465918126 is a wasteful number, since it uses less digits than its factorization.

21465918126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238360 (or 238357 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 21465918126 in words is "twenty-one billion, four hundred sixty-five million, nine hundred eighteen thousand, one hundred twenty-six".