22040032212 has 144 divisors (see below), whose sum is σ = 62081510400. Its totient is φ = 6536470080.

The previous prime is 22040032181. The next prime is 22040032253. The reversal of 22040032212 is 21223004022.

22040032212 is a `hidden beast` number, since 2 + 20 + 400 + 32 + 212 = 666.

It is a super-2 number, since 2×22040032212² (a number of 21 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 5582023 + ... + 5585969.

It is an arithmetic number, because the mean of its divisors is an integer number (431121600).

Almost surely, 2^22040032212 is an apocalyptic number.

22040032212 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 22040032212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31040755200).

22040032212 is an abundant number, since it is smaller than the sum of its proper divisors (40041478188).

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

22040032212 is a wasteful number, since it uses less digits than its factorization.

22040032212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266 (or 4261 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 22040032212 its reverse (21223004022), we get a palindrome (43263036234).

The spelling of 22040032212 in words is "twenty-two billion, forty million, thirty-two thousand, two hundred twelve".