18774900 has 108 divisors (see below), whose sum is σ = 61475232. Its totient is φ = 4783680.

The previous prime is 18774893. The next prime is 18774901. The reversal of 18774900 is 947781.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18774901) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20247 + ... + 21153.

Almost surely, 2^18774900 is an apocalyptic number.

18774900 is a gapful number since it is divisible by the number (10) 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 18774900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30737616).

18774900 is an abundant number, since it is smaller than the sum of its proper divisors (42700332).

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

18774900 is a wasteful number, since it uses less digits than its factorization.

18774900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18774900 is about 4333.0012693282. The cubic root of 18774900 is about 265.7821911577.

The spelling of 18774900 in words is "eighteen million, seven hundred seventy-four thousand, nine hundred".