18270863616 has 72 divisors (see below), whose sum is σ = 48982366944. Its totient is φ = 6045798400.

The previous prime is 18270863603. The next prime is 18270863617. The reversal of 18270863616 is 61636807281.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18270863617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18391 + ... + 192041.

It is an arithmetic number, because the mean of its divisors is an integer number (680310652).

Almost surely, 2^18270863616 is an apocalyptic number.

18270863616 is a gapful number since it is divisible by the number (16) 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 18270863616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24491183472).

18270863616 is an abundant number, since it is smaller than the sum of its proper divisors (30711503328).

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

18270863616 is a wasteful number, since it uses less digits than its factorization.

18270863616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173807 (or 173793 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18270863616 in words is "eighteen billion, two hundred seventy million, eight hundred sixty-three thousand, six hundred sixteen".