21922742259 has 20 divisors (see below), whose sum is σ = 35725951800. Its totient is φ = 13286509920.

The previous prime is 21922742251. The next prime is 21922742267. The reversal of 21922742259 is 95224722912.

21922742259 is a `hidden beast` number, since 219 + 2 + 2 + 7 + 422 + 5 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (21922742251) and next prime (21922742267).

It is not a de Polignac number, because 21922742259 - 2³ = 21922742251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21922742251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12301434 + ... + 12303215.

It is an arithmetic number, because the mean of its divisors is an integer number (1786297590).

Almost surely, 2^21922742259 is an apocalyptic number.

21922742259 is a deficient number, since it is larger than the sum of its proper divisors (13803209541).

21922742259 is a wasteful number, since it uses less digits than its factorization.

21922742259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24604672 (or 24604663 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 21922742259 in words is "twenty-one billion, nine hundred twenty-two million, seven hundred forty-two thousand, two hundred fifty-nine".