18448148172 has 18 divisors (see below), whose sum is σ = 43046776948. Its totient is φ = 6149225888.

The previous prime is 18448148161. The next prime is 18448148231. The reversal of 18448148172 is 27184184481.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450904 + ... + 490112.

Almost surely, 2^18448148172 is an apocalyptic number.

18448148172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18448148172 is an abundant number, since it is smaller than the sum of its proper divisors (24598628776).

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

18448148172 is an frugal number, since it uses more digits than its factorization.

18448148172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78425 (or 39214 counting only the distinct ones).

The product of its digits is 458752, while the sum is 48.

Multiplying 18448148172 by its sum of digits (48), we get a square (885511112256 = 941016²).

The spelling of 18448148172 in words is "eighteen billion, four hundred forty-eight million, one hundred forty-eight thousand, one hundred seventy-two".