18613716 has 48 divisors (see below), whose sum is σ = 49448448. Its totient is φ = 5394400.

The previous prime is 18613709. The next prime is 18613729. The reversal of 18613716 is 61731681.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (1030176).

Almost surely, 2^18613716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18613716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24724224).

18613716 is an abundant number, since it is smaller than the sum of its proper divisors (30834732).

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

18613716 is a wasteful number, since it uses less digits than its factorization.

18613716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6170 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 18613716 is about 4314.3615981974. The cubic root of 18613716 is about 265.0194171129.

The spelling of 18613716 in words is "eighteen million, six hundred thirteen thousand, seven hundred sixteen".