22155981730 has 16 divisors (see below), whose sum is σ = 41255966520. Its totient is φ = 8556792832.

The previous prime is 22155981691. The next prime is 22155981763. The reversal of 22155981730 is 3718955122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20721314601 + 1434667129 = 143949^2 + 37877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38199679 + ... + 38200258.

Almost surely, 2^22155981730 is an apocalyptic number.

22155981730 is a deficient number, since it is larger than the sum of its proper divisors (19099984790).

22155981730 is a wasteful number, since it uses less digits than its factorization.

22155981730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76399973.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 22155981730 in words is "twenty-two billion, one hundred fifty-five million, nine hundred eighty-one thousand, seven hundred thirty".