18916088490 has 256 divisors, whose sum is σ = 57767592960. Its totient is φ = 4368798720.

The previous prime is 18916088489. The next prime is 18916088491. The reversal of 18916088490 is 9488061981.

18916088490 is a `hidden beast` number, since 1 + 8 + 91 + 60 + 8 + 8 + 490 = 666.

It is an interprime number because it is at equal distance from previous prime (18916088489) and next prime (18916088491).

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

It is not an unprimeable number, because it can be changed into a prime (18916088491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4276480 + ... + 4280900.

It is an arithmetic number, because the mean of its divisors is an integer number (225654660).

Almost surely, 2^18916088490 is an apocalyptic number.

18916088490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18916088490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28883796480).

18916088490 is an abundant number, since it is smaller than the sum of its proper divisors (38851504470).

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

18916088490 is a wasteful number, since it uses less digits than its factorization.

18916088490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526 (or 4520 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 18916088490 in words is "eighteen billion, nine hundred sixteen million, eighty-eight thousand, four hundred ninety".