21437568326325 has 12 divisors (see below), whose sum is σ = 35443446299648. Its totient is φ = 11433369774000.

The previous prime is 21437568326287. The next prime is 21437568326329. The reversal of 21437568326325 is 52362386573412.

It is a happy number.

It is not a de Polignac number, because 21437568326325 - 2²² = 21437564132021 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 142917122101 + ... + 142917122250.

Almost surely, 2^{21437568326325} is an apocalyptic number.

21437568326325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21437568326325 is a deficient number, since it is larger than the sum of its proper divisors (14005877973323).

21437568326325 is a wasteful number, since it uses less digits than its factorization.

21437568326325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285834244364 (or 285834244359 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 57.

The spelling of 21437568326325 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred sixty-eight million, three hundred twenty-six thousand, three hundred twenty-five".