21537325214 has 16 divisors (see below), whose sum is σ = 33116040000. Its totient is φ = 10500349344.

The previous prime is 21537325181. The next prime is 21537325267. The reversal of 21537325214 is 41252373512.

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 7 ways as a sum of consecutive naturals, for example, 400589 + ... + 451160.

It is an arithmetic number, because the mean of its divisors is an integer number (2069752500).

Almost surely, 2^21537325214 is an apocalyptic number.

21537325214 is a deficient number, since it is larger than the sum of its proper divisors (11578714786).

21537325214 is a wasteful number, since it uses less digits than its factorization.

21537325214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852067.

The product of its digits is 50400, while the sum is 35.

Adding to 21537325214 its reverse (41252373512), we get a palindrome (62789698726).

The spelling of 21537325214 in words is "twenty-one billion, five hundred thirty-seven million, three hundred twenty-five thousand, two hundred fourteen".