21126142264 has 16 divisors (see below), whose sum is σ = 39696345000. Its totient is φ = 10540450272.

The previous prime is 21126142253. The next prime is 21126142333. The reversal of 21126142264 is 46224162112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823639 + ... + 2831110.

Almost surely, 2^21126142264 is an apocalyptic number.

It is an amenable number.

21126142264 is a deficient number, since it is larger than the sum of its proper divisors (18570202736).

21126142264 is a wasteful number, since it uses less digits than its factorization.

21126142264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5655222 (or 5655218 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The spelling of 21126142264 in words is "twenty-one billion, one hundred twenty-six million, one hundred forty-two thousand, two hundred sixty-four".