18498904416 has 240 divisors, whose sum is σ = 60112904544. Its totient is φ = 5550944256.

The previous prime is 18498904387. The next prime is 18498904519. The reversal of 18498904416 is 61440989481.

It is a happy number.

18498904416 is a `hidden beast` number, since 18 + 498 + 90 + 44 + 16 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1004346 + ... + 1022598.

Almost surely, 2^18498904416 is an apocalyptic number.

18498904416 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 18498904416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30056452272).

18498904416 is an abundant number, since it is smaller than the sum of its proper divisors (41614000128).

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

18498904416 is a wasteful number, since it uses less digits than its factorization.

18498904416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315 (or 18298 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 18498904416 in words is "eighteen billion, four hundred ninety-eight million, nine hundred four thousand, four hundred sixteen".