18432473720 has 128 divisors (see below), whose sum is σ = 44667288000. Its totient is φ = 6820724736.

The previous prime is 18432473711. The next prime is 18432473729. The reversal of 18432473720 is 2737423481.

It is an interprime number because it is at equal distance from previous prime (18432473711) and next prime (18432473729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18432473729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22287947 + ... + 22288773.

Almost surely, 2^18432473720 is an apocalyptic number.

18432473720 is a gapful number since it is divisible by the number (10) 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 18432473720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22333644000).

18432473720 is an abundant number, since it is smaller than the sum of its proper divisors (26234814280).

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

18432473720 is a wasteful number, since it uses less digits than its factorization.

18432473720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 18432473720 in words is "eighteen billion, four hundred thirty-two million, four hundred seventy-three thousand, seven hundred twenty".