18854990 has 64 divisors (see below), whose sum is σ = 43296768. Its totient is φ = 5740800.

The previous prime is 18854987. The next prime is 18854993. The reversal of 18854990 is 9945881.

It is an interprime number because it is at equal distance from previous prime (18854987) and next prime (18854993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18854993) 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, 35930 + ... + 36450.

It is an arithmetic number, because the mean of its divisors is an integer number (676512).

Almost surely, 2^18854990 is an apocalyptic number.

18854990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18854990 is an abundant number, since it is smaller than the sum of its proper divisors (24441778).

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

18854990 is a wasteful number, since it uses less digits than its factorization.

18854990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18854990 is about 4342.2332963580. The cubic root of 18854990 is about 266.1595797497.

The spelling of 18854990 in words is "eighteen million, eight hundred fifty-four thousand, nine hundred ninety".