18908810424 has 160 divisors (see below), whose sum is σ = 61671028320. Its totient is φ = 5300515584.

The previous prime is 18908810399. The next prime is 18908810429. The reversal of 18908810424 is 42401880981.

It is a super-2 number, since 2×18908810424² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18908810424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18908810429) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 201082 + ... + 279734.

It is an arithmetic number, because the mean of its divisors is an integer number (385443927).

Almost surely, 2^18908810424 is an apocalyptic number.

18908810424 is a gapful number since it is divisible by the number (14) 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 18908810424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30835514160).

18908810424 is an abundant number, since it is smaller than the sum of its proper divisors (42762217896).

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

18908810424 is a wasteful number, since it uses less digits than its factorization.

18908810424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78731 (or 78718 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 18908810424 in words is "eighteen billion, nine hundred eight million, eight hundred ten thousand, four hundred twenty-four".