18902409216 has 224 divisors, whose sum is σ = 53331514368. Its totient is φ = 5945425920.

The previous prime is 18902409209. The next prime is 18902409233. The reversal of 18902409216 is 61290420981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32759520 + ... + 32760096.

Almost surely, 2^18902409216 is an apocalyptic number.

18902409216 is a gapful number since it is divisible by the number (16) 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 18902409216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26665757184).

18902409216 is an abundant number, since it is smaller than the sum of its proper divisors (34429105152).

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

18902409216 is an equidigital number, since it uses as much as digits as its factorization.

18902409216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 18902409216 in words is "eighteen billion, nine hundred two million, four hundred nine thousand, two hundred sixteen".