22729899918 has 64 divisors (see below), whose sum is σ = 53886689280. Its totient is φ = 6314824800.

The previous prime is 22729899869. The next prime is 22729899947. The reversal of 22729899918 is 81999892722.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253480 + ... + 331227.

It is an arithmetic number, because the mean of its divisors is an integer number (841979520).

Almost surely, 2^22729899918 is an apocalyptic number.

22729899918 is an abundant number, since it is smaller than the sum of its proper divisors (31156789362).

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

22729899918 is a wasteful number, since it uses less digits than its factorization.

22729899918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584773.

The product of its digits is 23514624, while the sum is 66.

The spelling of 22729899918 in words is "twenty-two billion, seven hundred twenty-nine million, eight hundred ninety-nine thousand, nine hundred eighteen".