22012400054500 has 24 divisors (see below), whose sum is σ = 48075081720120. Its totient is φ = 8804960021600.

The previous prime is 22012400054479. The next prime is 22012400054509. The reversal of 22012400054500 is 545000421022.

It can be written as a sum of positive squares in 4 ways, for example, as 44131085476 + 21968268969024 = 210074^2 + 4687032^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (22012400054509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22012399555 + ... + 22012400554.

It is an arithmetic number, because the mean of its divisors is an integer number (2003128405005).

Almost surely, 2^{22012400054500} is an apocalyptic number.

22012400054500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012400054500 is an abundant number, since it is smaller than the sum of its proper divisors (26062681665620).

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

22012400054500 is a wasteful number, since it uses less digits than its factorization.

22012400054500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44024800128 (or 44024800116 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 22012400054500 its reverse (545000421022), we get a palindrome (22557400475522).

The spelling of 22012400054500 in words is "twenty-two trillion, twelve billion, four hundred million, fifty-four thousand, five hundred".