22400412012 has 108 divisors (see below), whose sum is σ = 62367243120. Its totient is φ = 6773997120.

The previous prime is 22400411993. The next prime is 22400412079. The reversal of 22400412012 is 21021400422.

22400412012 is a `hidden beast` number, since 2 + 240 + 0 + 412 + 0 + 12 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2212153 + ... + 2222255.

Almost surely, 2^22400412012 is an apocalyptic number.

22400412012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22400412012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31183621560).

22400412012 is an abundant number, since it is smaller than the sum of its proper divisors (39966831108).

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

22400412012 is a wasteful number, since it uses less digits than its factorization.

22400412012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10644 (or 10628 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22400412012 its reverse (21021400422), we get a palindrome (43421812434).

The spelling of 22400412012 in words is "twenty-two billion, four hundred million, four hundred twelve thousand, twelve".