18492779520 has 880 divisors, whose sum is σ = 72974534688. Its totient is φ = 4459069440.

The previous prime is 18492779509. The next prime is 18492779551. The reversal of 18492779520 is 2597729481.

18492779520 is a `hidden beast` number, since 1 + 8 + 49 + 2 + 7 + 79 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 303160290 + ... + 303160350.

Almost surely, 2^18492779520 is an apocalyptic number.

18492779520 is a gapful number since it is divisible by the number (10) 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 18492779520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36487267344).

18492779520 is an abundant number, since it is smaller than the sum of its proper divisors (54481755168).

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

18492779520 is a wasteful number, since it uses less digits than its factorization.

18492779520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 18492779520 in words is "eighteen billion, four hundred ninety-two million, seven hundred seventy-nine thousand, five hundred twenty".