22206399840 has 72 divisors (see below), whose sum is σ = 75779344368. Its totient is φ = 5921706240.

The previous prime is 22206399827. The next prime is 22206399857. The reversal of 22206399840 is 4899360222.

22206399840 is a `hidden beast` number, since 2 + 2 + 2 + 0 + 639 + 9 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7709116 + ... + 7711995.

It is an arithmetic number, because the mean of its divisors is an integer number (1052490894).

Almost surely, 2^22206399840 is an apocalyptic number.

22206399840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22206399840 is an abundant number, since it is smaller than the sum of its proper divisors (53572944528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22206399840 is a wasteful number, since it uses less digits than its factorization.

22206399840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15421132 (or 15421121 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 22206399840 in words is "twenty-two billion, two hundred six million, three hundred ninety-nine thousand, eight hundred forty".