18609020352 has 560 divisors, whose sum is σ = 64747932480. Its totient is φ = 5231443968.

The previous prime is 18609020333. The next prime is 18609020359. The reversal of 18609020352 is 25302090681.

18609020352 is a `hidden beast` number, since 18 + 609 + 0 + 2 + 0 + 35 + 2 = 666.

It is a super-2 number, since 2×18609020352² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18609020359) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42389349 + ... + 42389787.

It is an arithmetic number, because the mean of its divisors is an integer number (115621308).

Almost surely, 2^18609020352 is an apocalyptic number.

18609020352 is a gapful number since it is divisible by the number (12) 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 18609020352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32373966240).

18609020352 is an abundant number, since it is smaller than the sum of its proper divisors (46138912128).

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

18609020352 is a wasteful number, since it uses less digits than its factorization.

18609020352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 18609020352 in words is "eighteen billion, six hundred nine million, twenty thousand, three hundred fifty-two".