20400222204 has 36 divisors (see below), whose sum is σ = 53230690240. Its totient is φ = 6580716480.

The previous prime is 20400222149. The next prime is 20400222229. The reversal of 20400222204 is 40222200402.

20400222204 is a `hidden beast` number, since 20 + 400 + 22 + 220 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 9138769 + ... + 9141000.

Almost surely, 2^20400222204 is an apocalyptic number.

It is an amenable number.

20400222204 is an abundant number, since it is smaller than the sum of its proper divisors (32830468036).

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

20400222204 is a wasteful number, since it uses less digits than its factorization.

20400222204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18279810 (or 18279805 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20400222204 its reverse (40222200402), we get a palindrome (60622422606).

The spelling of 20400222204 in words is "twenty billion, four hundred million, two hundred twenty-two thousand, two hundred four".