21437568326324 has 24 divisors (see below), whose sum is σ = 37648881442368. Its totient is φ = 10680746209920.

The previous prime is 21437568326287. The next prime is 21437568326329. The reversal of 21437568326324 is 42362386573412.

It is a self number, because there is not a number n which added to its sum of digits gives 21437568326324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21437568326329) 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, 115009769 + ... + 115196015.

It is an arithmetic number, because the mean of its divisors is an integer number (1568703393432).

Almost surely, 2^{21437568326324} is an apocalyptic number.

It is an amenable number.

21437568326324 is a deficient number, since it is larger than the sum of its proper divisors (16211313116044).

21437568326324 is a wasteful number, since it uses less digits than its factorization.

21437568326324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288215 (or 288213 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 56.

The spelling of 21437568326324 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred sixty-eight million, three hundred twenty-six thousand, three hundred twenty-four".