22081554432 has 432 divisors, whose sum is σ = 77486310720. Its totient is φ = 6029033472.

The previous prime is 22081554367. The next prime is 22081554457. The reversal of 22081554432 is 23445518022.

22081554432 is a `hidden beast` number, since 2 + 2 + 0 + 81 + 5 + 544 + 32 = 666.

It is a super-2 number, since 2×22081554432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 20772333 + ... + 20773395.

It is an arithmetic number, because the mean of its divisors is an integer number (179366460).

Almost surely, 2^22081554432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22081554432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38743155360).

22081554432 is an abundant number, since it is smaller than the sum of its proper divisors (55404756288).

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

22081554432 is a wasteful number, since it uses less digits than its factorization.

22081554432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 22081554432 in words is "twenty-two billion, eighty-one million, five hundred fifty-four thousand, four hundred thirty-two".