18922772505 has 256 divisors, whose sum is σ = 41943121920. Its totient is φ = 7049576448.

The previous prime is 18922772503. The next prime is 18922772509. The reversal of 18922772505 is 50527722981.

It is not a de Polignac number, because 18922772505 - 2¹ = 18922772503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18922772503) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 73629337 + ... + 73629593.

It is an arithmetic number, because the mean of its divisors is an integer number (163840320).

Almost surely, 2^18922772505 is an apocalyptic number.

18922772505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18922772505 is an abundant number, since it is smaller than the sum of its proper divisors (23020349415).

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

18922772505 is a wasteful number, since it uses less digits than its factorization.

18922772505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 18922772505 in words is "eighteen billion, nine hundred twenty-two million, seven hundred seventy-two thousand, five hundred five".