18949896 has 128 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 5313600.

The previous prime is 18949877. The next prime is 18949949. The reversal of 18949896 is 69894981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

Its product of digits (1119744) is a multiple of the sum of its prime factors (256).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125421 + ... + 125571.

It is an arithmetic number, because the mean of its divisors is an integer number (478800).

Almost surely, 2^18949896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30643200).

18949896 is an abundant number, since it is smaller than the sum of its proper divisors (42336504).

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

18949896 is a wasteful number, since it uses less digits than its factorization.

18949896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 246 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 18949896 is about 4353.1478265733. The cubic root of 18949896 is about 266.6054012034.

The spelling of 18949896 in words is "eighteen million, nine hundred forty-nine thousand, eight hundred ninety-six".