18949632 has 120 divisors (see below), whose sum is σ = 55413864. Its totient is φ = 5750784.

The previous prime is 18949591. The next prime is 18949633. The reversal of 18949632 is 23694981.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259548 + ... + 259620.

Almost surely, 2^18949632 is an apocalyptic number.

18949632 is a gapful number since it is divisible by the number (12) 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 18949632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27706932).

18949632 is an abundant number, since it is smaller than the sum of its proper divisors (36464232).

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

18949632 is an equidigital number, since it uses as much as digits as its factorization.

18949632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 91 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 18949632 is about 4353.1175035829. The cubic root of 18949632 is about 266.6041631288.

The spelling of 18949632 in words is "eighteen million, nine hundred forty-nine thousand, six hundred thirty-two".