22137621718 has 4 divisors (see below), whose sum is σ = 33206432580. Its totient is φ = 11068810858.

The previous prime is 22137621707. The next prime is 22137621721. The reversal of 22137621718 is 81712673122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81712673122 = 2 ⋅40856336561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5534405428 + ... + 5534405431.

It is an arithmetic number, because the mean of its divisors is an integer number (8301608145).

Almost surely, 2^22137621718 is an apocalyptic number.

22137621718 is a deficient number, since it is larger than the sum of its proper divisors (11068810862).

22137621718 is a wasteful number, since it uses less digits than its factorization.

22137621718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068810861.

The product of its digits is 56448, while the sum is 40.

The spelling of 22137621718 in words is "twenty-two billion, one hundred thirty-seven million, six hundred twenty-one thousand, seven hundred eighteen".