22040020251 has 48 divisors (see below), whose sum is σ = 33215176800. Its totient is φ = 14071034880.

The previous prime is 22040020231. The next prime is 22040020259. The reversal of 22040020251 is 15202004022.

22040020251 is a `hidden beast` number, since 220 + 400 + 20 + 25 + 1 = 666.

It is not a de Polignac number, because 22040020251 - 2¹⁸ = 22039758107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22040020259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5604756 + ... + 5608686.

It is an arithmetic number, because the mean of its divisors is an integer number (691982850).

Almost surely, 2^22040020251 is an apocalyptic number.

22040020251 is a deficient number, since it is larger than the sum of its proper divisors (11175156549).

22040020251 is a wasteful number, since it uses less digits than its factorization.

22040020251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 22040020251 its reverse (15202004022), we get a palindrome (37242024273).

The spelling of 22040020251 in words is "twenty-two billion, forty million, twenty thousand, two hundred fifty-one".