22171920405 has 32 divisors (see below), whose sum is σ = 36375886080. Its totient is φ = 11528186880.

The previous prime is 22171920341. The next prime is 22171920457. The reversal of 22171920405 is 50402917122.

It is not a de Polignac number, because 22171920405 - 2⁶ = 22171920341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3825 + ... + 210614.

It is an arithmetic number, because the mean of its divisors is an integer number (1136746440).

Almost surely, 2^22171920405 is an apocalyptic number.

It is an amenable number.

22171920405 is a deficient number, since it is larger than the sum of its proper divisors (14203965675).

22171920405 is a wasteful number, since it uses less digits than its factorization.

22171920405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214621.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 22171920405 in words is "twenty-two billion, one hundred seventy-one million, nine hundred twenty thousand, four hundred five".