18344309952 has 112 divisors (see below), whose sum is σ = 51613746912. Its totient is φ = 5730140160.

The previous prime is 18344309897. The next prime is 18344309959. The reversal of 18344309952 is 25990344381.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18344309959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748452 + ... + 772572.

It is an arithmetic number, because the mean of its divisors is an integer number (460837026).

Almost surely, 2^18344309952 is an apocalyptic number.

18344309952 is a gapful number since it is divisible by the number (12) 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 18344309952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25806873456).

18344309952 is an abundant number, since it is smaller than the sum of its proper divisors (33269436960).

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

18344309952 is a wasteful number, since it uses less digits than its factorization.

18344309952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24386 (or 24376 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 18344309952 in words is "eighteen billion, three hundred forty-four million, three hundred nine thousand, nine hundred fifty-two".