18862262640 has 320 divisors, whose sum is σ = 70840049280. Its totient is φ = 4642458624.

The previous prime is 18862262599. The next prime is 18862262659. The reversal of 18862262640 is 4626226881.

18862262640 is a `hidden beast` number, since 18 + 8 + 6 + 2 + 2 + 626 + 4 + 0 = 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 63 ways as a sum of consecutive naturals, for example, 2270334 + ... + 2278626.

It is an arithmetic number, because the mean of its divisors is an integer number (221375154).

Almost surely, 2^18862262640 is an apocalyptic number.

18862262640 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 18862262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35420024640).

18862262640 is an abundant number, since it is smaller than the sum of its proper divisors (51977786640).

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

18862262640 is an equidigital number, since it uses as much as digits as its factorization.

18862262640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340 (or 8316 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 18862262640 in words is "eighteen billion, eight hundred sixty-two million, two hundred sixty-two thousand, six hundred forty".