18881712 has 60 divisors (see below), whose sum is σ = 55149744. Its totient is φ = 6019200.

The previous prime is 18881699. The next prime is 18881719. The reversal of 18881712 is 21718881.

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

It is not an unprimeable number, because it can be changed into a prime (18881719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462 + ... + 6162.

Almost surely, 2^18881712 is an apocalyptic number.

18881712 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 18881712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27574872).

18881712 is an abundant number, since it is smaller than the sum of its proper divisors (36268032).

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

18881712 is a wasteful number, since it uses less digits than its factorization.

18881712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738 (or 5729 counting only the distinct ones).

The product of its digits is 7168, while the sum is 36.

The square root of 18881712 is about 4345.3091949826. The cubic root of 18881712 is about 266.2852575143.

It can be divided in two parts, 1888 and 1712, that added together give a square (3600 = 60²).

The spelling of 18881712 in words is "eighteen million, eight hundred eighty-one thousand, seven hundred twelve".