22400402420 has 48 divisors (see below), whose sum is σ = 53548483968. Its totient is φ = 7791442560.

The previous prime is 22400402377. The next prime is 22400402447. The reversal of 22400402420 is 2420400422.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22400402392 and 22400402401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2208419 + ... + 2218538.

It is an arithmetic number, because the mean of its divisors is an integer number (1115593416).

Almost surely, 2^22400402420 is an apocalyptic number.

22400402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22400402420 is an abundant number, since it is smaller than the sum of its proper divisors (31148081548).

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

22400402420 is a wasteful number, since it uses less digits than its factorization.

22400402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427000 (or 4426998 counting only the distinct ones).

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

Adding to 22400402420 its reverse (2420400422), we get a palindrome (24820802842).

The spelling of 22400402420 in words is "twenty-two billion, four hundred million, four hundred two thousand, four hundred twenty".