21249626943237 has 96 divisors (see below), whose sum is σ = 37143103205376. Its totient is φ = 10557689936640.

The previous prime is 21249626943173. The next prime is 21249626943241. The reversal of 21249626943237 is 73234962694212.

It is not a de Polignac number, because 21249626943237 - 2⁶ = 21249626943173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21249626943247) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 907432753 + ... + 907456169.

It is an arithmetic number, because the mean of its divisors is an integer number (386907325056).

Almost surely, 2^{21249626943237} is an apocalyptic number.

It is an amenable number.

21249626943237 is a deficient number, since it is larger than the sum of its proper divisors (15893476262139).

21249626943237 is a wasteful number, since it uses less digits than its factorization.

21249626943237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38999 (or 38988 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 60.

The spelling of 21249626943237 in words is "twenty-one trillion, two hundred forty-nine billion, six hundred twenty-six million, nine hundred forty-three thousand, two hundred thirty-seven".