22947213825 has 36 divisors (see below), whose sum is σ = 41136287868. Its totient is φ = 12228009600.

The previous prime is 22947213811. The next prime is 22947213859. The reversal of 22947213825 is 52831274922.

22947213825 is a `hidden beast` number, since 2 + 29 + 472 + 138 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 910108224 + 22037105601 = 30168^2 + 148449^2 .

It is not a de Polignac number, because 22947213825 - 2⁶ = 22947213761 is a prime.

It is a super-2 number, since 2×22947213825² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 222547 + ... + 308903.

It is an arithmetic number, because the mean of its divisors is an integer number (1142674663).

Almost surely, 2^22947213825 is an apocalyptic number.

22947213825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22947213825 is a deficient number, since it is larger than the sum of its proper divisors (18189074043).

22947213825 is a wasteful number, since it uses less digits than its factorization.

22947213825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87554 (or 87546 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 22947213825 in words is "twenty-two billion, nine hundred forty-seven million, two hundred thirteen thousand, eight hundred twenty-five".