20400022244 has 12 divisors (see below), whose sum is σ = 40800044544. Its totient is φ = 8742866664.

The previous prime is 20400022241. The next prime is 20400022271. The reversal of 20400022244 is 44222000402.

20400022244 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20400022241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364286084 + ... + 364286139.

It is an arithmetic number, because the mean of its divisors is an integer number (3400003712).

Almost surely, 2^20400022244 is an apocalyptic number.

It is an amenable number.

20400022244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20400022244 is a wasteful number, since it uses less digits than its factorization.

20400022244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728572234 (or 728572232 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20400022244 its reverse (44222000402), we get a palindrome (64622022646).

The spelling of 20400022244 in words is "twenty billion, four hundred million, twenty-two thousand, two hundred forty-four".