23115939840 has 480 divisors, whose sum is σ = 93991484160. Its totient is φ = 5280104448.

The previous prime is 23115939827. The next prime is 23115939853. The reversal of 23115939840 is 4893951132.

It is a happy number.

23115939840 is a `hidden beast` number, since 2 + 3 + 11 + 593 + 9 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (23115939827) and next prime (23115939853).

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15482134 + ... + 15483626.

It is an arithmetic number, because the mean of its divisors is an integer number (195815592).

Almost surely, 2^23115939840 is an apocalyptic number.

23115939840 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 23115939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46995742080).

23115939840 is an abundant number, since it is smaller than the sum of its proper divisors (70875544320).

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

23115939840 is an equidigital number, since it uses as much as digits as its factorization.

23115939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 23115939840 in words is "twenty-three billion, one hundred fifteen million, nine hundred thirty-nine thousand, eight hundred forty".