23581388040 has 128 divisors (see below), whose sum is σ = 81441020160. Its totient is φ = 5350662144.

The previous prime is 23581388027. The next prime is 23581388069. The reversal of 23581388040 is 4088318532.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 23581387983 and 23581388001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12624 + ... + 217536.

It is an arithmetic number, because the mean of its divisors is an integer number (636257970).

Almost surely, 2^23581388040 is an apocalyptic number.

23581388040 is a gapful number since it is divisible by the number (20) 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 23581388040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40720510080).

23581388040 is an abundant number, since it is smaller than the sum of its proper divisors (57859632120).

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

23581388040 is a wasteful number, since it uses less digits than its factorization.

23581388040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205071 (or 205067 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 23581388040 in words is "twenty-three billion, five hundred eighty-one million, three hundred eighty-eight thousand, forty".