22021949138 has 16 divisors (see below), whose sum is σ = 37754112960. Its totient is φ = 9437428176.

The previous prime is 22021949129. The next prime is 22021949143. The reversal of 22021949138 is 83194912022.

It is a junction number, because it is equal to n+sod(n) for n = 22021949095 and 22021949104.

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, 285620 + ... + 354432.

It is an arithmetic number, because the mean of its divisors is an integer number (2359632060).

Almost surely, 2^22021949138 is an apocalyptic number.

22021949138 is a deficient number, since it is larger than the sum of its proper divisors (15732163822).

22021949138 is a wasteful number, since it uses less digits than its factorization.

22021949138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91681.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 22021949138 in words is "twenty-two billion, twenty-one million, nine hundred forty-nine thousand, one hundred thirty-eight".