22685781924 has 81 divisors (see below), whose sum is σ = 62127230529. Its totient is φ = 6976625760.

The previous prime is 22685781919. The next prime is 22685781953. The reversal of 22685781924 is 42918758622.

The square root of 22685781924 is 150618.

It is a perfect power (a square), and thus also a powerful number.

22685781924 is a `hidden beast` number, since 2 + 2 + 68 + 578 + 1 + 9 + 2 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3355884900 + 19329897024 = 57930^2 + 139032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11747239 + ... + 11749169.

Almost surely, 2^22685781924 is an apocalyptic number.

22685781924 is the 150618-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22685781924

22685781924 is an abundant number, since it is smaller than the sum of its proper divisors (39441448605).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22685781924 is a wasteful number, since it uses less digits than its factorization.

22685781924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898 (or 1949 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

It can be divided in two parts, 22685 and 781924, that added together give a square (804609 = 897²).

The spelling of 22685781924 in words is "twenty-two billion, six hundred eighty-five million, seven hundred eighty-one thousand, nine hundred twenty-four".