21411667922 has 18 divisors (see below), whose sum is σ = 32454032247. Its totient is φ = 10594811724.

The previous prime is 21411667919. The next prime is 21411667951. The reversal of 21411667922 is 22976611412.

It can be written as a sum of positive squares in only one way, i.e., 10705833961 + 10705833961 = 103469^2 + 103469^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=103469.

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 21411667922.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22141883 + ... + 22142849.

Almost surely, 2^21411667922 is an apocalyptic number.

21411667922 is a deficient number, since it is larger than the sum of its proper divisors (11042364325).

21411667922 is an frugal number, since it uses more digits than its factorization.

21411667922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150 (or 1076 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The spelling of 21411667922 in words is "twenty-one billion, four hundred eleven million, six hundred sixty-seven thousand, nine hundred twenty-two".