22791197520 has 960 divisors, whose sum is σ = 99660288000. Its totient is φ = 4633251840.

The previous prime is 22791197483. The next prime is 22791197573. The reversal of 22791197520 is 2579119722.

22791197520 is a `hidden beast` number, since 2 + 2 + 7 + 9 + 119 + 7 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 99524766 + ... + 99524994.

It is an arithmetic number, because the mean of its divisors is an integer number (103812800).

Almost surely, 2^22791197520 is an apocalyptic number.

22791197520 is a gapful number since it is divisible by the number (20) 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 22791197520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49830144000).

22791197520 is an abundant number, since it is smaller than the sum of its proper divisors (76869090480).

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

22791197520 is a wasteful number, since it uses less digits than its factorization.

22791197520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 22791197520 in words is "twenty-two billion, seven hundred ninety-one million, one hundred ninety-seven thousand, five hundred twenty".