22742899538 has 6 divisors (see below), whose sum is σ = 34114669221. Its totient is φ = 11371343132.

The previous prime is 22742899499. The next prime is 22742899549. The reversal of 22742899538 is 83599824722.

It can be written as a sum of positive squares in 2 ways, for example, as 13995599809 + 8747299729 = 118303^2 + 93527^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=106637.

It is a super-2 number, since 2×22742899538² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 159956 + ... + 266592.

Almost surely, 2^22742899538 is an apocalyptic number.

22742899538 is a deficient number, since it is larger than the sum of its proper divisors (11371769683).

22742899538 is an frugal number, since it uses more digits than its factorization.

22742899538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213276 (or 106639 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 59.

The spelling of 22742899538 in words is "twenty-two billion, seven hundred forty-two million, eight hundred ninety-nine thousand, five hundred thirty-eight".