21252736037 has 8 divisors (see below), whose sum is σ = 22888773600. Its totient is φ = 19616871600.

The previous prime is 21252735989. The next prime is 21252736079. The reversal of 21252736037 is 73063725212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21252736037 - 2²⁸ = 20984300581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252736937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332714 + ... + 391412.

It is an arithmetic number, because the mean of its divisors is an integer number (2861096700).

Almost surely, 2^21252736037 is an apocalyptic number.

It is an amenable number.

21252736037 is a deficient number, since it is larger than the sum of its proper divisors (1636037563).

21252736037 is a wasteful number, since it uses less digits than its factorization.

21252736037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86563.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 21252736037 in words is "twenty-one billion, two hundred fifty-two million, seven hundred thirty-six thousand, thirty-seven".