22521838725 has 24 divisors (see below), whose sum is σ = 41373453120. Its totient is φ = 12011646960.

The previous prime is 22521838721. The next prime is 22521838739. The reversal of 22521838725 is 52783812522.

22521838725 is a `hidden beast` number, since 2 + 252 + 18 + 387 + 2 + 5 = 666.

It is not a de Polignac number, because 22521838725 - 2² = 22521838721 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521838721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16682169 + ... + 16683518.

It is an arithmetic number, because the mean of its divisors is an integer number (1723893880).

Almost surely, 2^22521838725 is an apocalyptic number.

22521838725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22521838725 is a deficient number, since it is larger than the sum of its proper divisors (18851614395).

22521838725 is a wasteful number, since it uses less digits than its factorization.

22521838725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33365706 (or 33365695 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 22521838725 in words is "twenty-two billion, five hundred twenty-one million, eight hundred thirty-eight thousand, seven hundred twenty-five".