18887046 has 32 divisors (see below), whose sum is σ = 38659680. Its totient is φ = 6150144.

The previous prime is 18887039. The next prime is 18887047. The reversal of 18887046 is 64078881.

It is a super-2 number, since 2×18887046² = 713441013212232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18886989 and 18887007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60186 + ... + 60498.

It is an arithmetic number, because the mean of its divisors is an integer number (1208115).

Almost surely, 2^18887046 is an apocalyptic number.

18887046 is an abundant number, since it is smaller than the sum of its proper divisors (19772634).

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

18887046 is a wasteful number, since it uses less digits than its factorization.

18887046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18887046 is about 4345.9229169418. The cubic root of 18887046 is about 266.3103299554.

The spelling of 18887046 in words is "eighteen million, eight hundred eighty-seven thousand, forty-six".