18900700 has 144 divisors (see below), whose sum is σ = 52885504. Its totient is φ = 5702400.

The previous prime is 18900691. The next prime is 18900703. The reversal of 18900700 is 700981.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282067 + ... + 282133.

Almost surely, 2^18900700 is an apocalyptic number.

18900700 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 18900700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26442752).

18900700 is an abundant number, since it is smaller than the sum of its proper divisors (33984804).

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

18900700 is a wasteful number, since it uses less digits than its factorization.

18900700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 18900700 is about 4347.4935307600. The cubic root of 18900700 is about 266.3744890155.

It can be divided in two parts, 18900 and 700, that added together give a square (19600 = 140²).

The spelling of 18900700 in words is "eighteen million, nine hundred thousand, seven hundred".