18417227020 has 24 divisors (see below), whose sum is σ = 38726503200. Its totient is φ = 7357304832.

The previous prime is 18417226969. The next prime is 18417227021. The reversal of 18417227020 is 2072271481.

It is a happy number.

It is a super-2 number, since 2×18417227020² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18417227021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583360 + ... + 614119.

It is an arithmetic number, because the mean of its divisors is an integer number (1613604300).

Almost surely, 2^18417227020 is an apocalyptic number.

18417227020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18417227020 is an abundant number, since it is smaller than the sum of its proper divisors (20309276180).

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

18417227020 is a wasteful number, since it uses less digits than its factorization.

18417227020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198257 (or 1198255 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The spelling of 18417227020 in words is "eighteen billion, four hundred seventeen million, two hundred twenty-seven thousand, twenty".