21252604626331 has 16 divisors (see below), whose sum is σ = 23422636357120. Its totient is φ = 19159147274400.

The previous prime is 21252604626293. The next prime is 21252604626343. The reversal of 21252604626331 is 13362640625212.

It is a cyclic number.

It is not a de Polignac number, because 21252604626331 - 2¹⁹ = 21252604102043 is a prime.

It is a super-2 number, since 2×21252604626331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (21252604626361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2053780 + ... + 6835438.

It is an arithmetic number, because the mean of its divisors is an integer number (1463914772320).

Almost surely, 2^{21252604626331} is an apocalyptic number.

21252604626331 is a deficient number, since it is larger than the sum of its proper divisors (2170031730789).

21252604626331 is a wasteful number, since it uses less digits than its factorization.

21252604626331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789666.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 21252604626331 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred four million, six hundred twenty-six thousand, three hundred thirty-one".