22001157418 has 4 divisors (see below), whose sum is σ = 33001736130. Its totient is φ = 11000578708.

The previous prime is 22001157401. The next prime is 22001157421. The reversal of 22001157418 is 81475110022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81475110022 = 2 ⋅40737555011.

It can be written as a sum of positive squares in only one way, i.e., 19926992569 + 2074164849 = 141163^2 + 45543^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22001157418.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500289353 + ... + 5500289356.

Almost surely, 2^22001157418 is an apocalyptic number.

22001157418 is a deficient number, since it is larger than the sum of its proper divisors (11000578712).

22001157418 is a wasteful number, since it uses less digits than its factorization.

22001157418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000578711.

The product of its (nonzero) digits is 4480, while the sum is 31.

The spelling of 22001157418 in words is "twenty-two billion, one million, one hundred fifty-seven thousand, four hundred eighteen".