18695490 has 64 divisors (see below), whose sum is σ = 49375872. Its totient is φ = 4492800.

The previous prime is 18695473. The next prime is 18695491. The reversal of 18695490 is 9459681.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18695491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59574 + ... + 59886.

It is an arithmetic number, because the mean of its divisors is an integer number (771498).

Almost surely, 2^18695490 is an apocalyptic number.

18695490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18695490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24687936).

18695490 is an abundant number, since it is smaller than the sum of its proper divisors (30680382).

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

18695490 is a wasteful number, since it uses less digits than its factorization.

18695490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 18695490 is about 4323.8281649483. The cubic root of 18695490 is about 265.4069456595.

The spelling of 18695490 in words is "eighteen million, six hundred ninety-five thousand, four hundred ninety".