22012635842 has 6 divisors (see below), whose sum is σ = 33019268499. Its totient is φ = 11006213010.

The previous prime is 22012635817. The next prime is 22012635851. The reversal of 22012635842 is 24853621022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11006317921 + 11006317921 = 104911^2 + 104911^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104911.

It is a super-2 number, since 2×22012635842² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 157367 + ... + 262277.

Almost surely, 2^22012635842 is an apocalyptic number.

22012635842 is a deficient number, since it is larger than the sum of its proper divisors (11006632657).

22012635842 is an frugal number, since it uses more digits than its factorization.

22012635842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209824 (or 104913 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 22012635842 in words is "twenty-two billion, twelve million, six hundred thirty-five thousand, eight hundred forty-two".