23281388544 has 88 divisors (see below), whose sum is σ = 62111187568. Its totient is φ = 7753236480.

The previous prime is 23281388539. The next prime is 23281388549. The reversal of 23281388544 is 44588318232.

It is an interprime number because it is at equal distance from previous prime (23281388539) and next prime (23281388549).

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

It is a junction number, because it is equal to n+sod(n) for n = 23281388493 and 23281388502.

It is not an unprimeable number, because it can be changed into a prime (23281388549) 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, 4055244 + ... + 4060980.

Almost surely, 2^23281388544 is an apocalyptic number.

23281388544 is a gapful number since it is divisible by the number (24) 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 23281388544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31055593784).

23281388544 is an abundant number, since it is smaller than the sum of its proper divisors (38829799024).

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

23281388544 is a wasteful number, since it uses less digits than its factorization.

23281388544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7081 (or 7063 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The spelling of 23281388544 in words is "twenty-three billion, two hundred eighty-one million, three hundred eighty-eight thousand, five hundred forty-four".