22812493387 has 4 divisors (see below), whose sum is σ = 23599131120. Its totient is φ = 22025855656.

The previous prime is 22812493367. The next prime is 22812493391. The reversal of 22812493387 is 78339421822.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-22812493387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22812493387.

It is not an unprimeable number, because it can be changed into a prime (22812493337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393318823 + ... + 393318880.

It is an arithmetic number, because the mean of its divisors is an integer number (5899782780).

Almost surely, 2^22812493387 is an apocalyptic number.

22812493387 is a deficient number, since it is larger than the sum of its proper divisors (786637733).

22812493387 is an equidigital number, since it uses as much as digits as its factorization.

22812493387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786637732.

The product of its digits is 1161216, while the sum is 49.

The spelling of 22812493387 in words is "twenty-two billion, eight hundred twelve million, four hundred ninety-three thousand, three hundred eighty-seven".