22173494868 has 288 divisors, whose sum is σ = 68474585088. Its totient is φ = 5916326400.

The previous prime is 22173494857. The next prime is 22173494897. The reversal of 22173494868 is 86849437122.

22173494868 is a `hidden beast` number, since 2 + 2 + 1 + 73 + 494 + 86 + 8 = 666.

It is a super-2 number, since 2×22173494868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34270921 + ... + 34271567.

It is an arithmetic number, because the mean of its divisors is an integer number (237758976).

Almost surely, 2^22173494868 is an apocalyptic number.

22173494868 is a gapful number since it is divisible by the number (28) 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 22173494868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34237292544).

22173494868 is an abundant number, since it is smaller than the sum of its proper divisors (46301090220).

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

22173494868 is a wasteful number, since it uses less digits than its factorization.

22173494868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 838 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 22173494868 in words is "twenty-two billion, one hundred seventy-three million, four hundred ninety-four thousand, eight hundred sixty-eight".