22138709042 has 6 divisors (see below), whose sum is σ = 33208379199. Its totient is φ = 11069249310.

The previous prime is 22138709003. The next prime is 22138709071. The reversal of 22138709042 is 24090783122.

It can be written as a sum of positive squares in only one way, i.e., 11069354521 + 11069354521 = 105211^2 + 105211^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105211.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22138708987 and 22138709005.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 157817 + ... + 263027.

Almost surely, 2^22138709042 is an apocalyptic number.

22138709042 is a deficient number, since it is larger than the sum of its proper divisors (11069670157).

22138709042 is an frugal number, since it uses more digits than its factorization.

22138709042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210424 (or 105213 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 22138709042 in words is "twenty-two billion, one hundred thirty-eight million, seven hundred nine thousand, forty-two".