23671187640 has 192 divisors, whose sum is σ = 79157463840. Its totient is φ = 6131036160.

The previous prime is 23671187629. The next prime is 23671187641. The reversal of 23671187640 is 4678117632.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23671187641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3435639 + ... + 3442521.

Almost surely, 2^23671187640 is an apocalyptic number.

23671187640 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 23671187640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39578731920).

23671187640 is an abundant number, since it is smaller than the sum of its proper divisors (55486276200).

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

23671187640 is a wasteful number, since it uses less digits than its factorization.

23671187640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7174 (or 7167 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 23671187640 in words is "twenty-three billion, six hundred seventy-one million, one hundred eighty-seven thousand, six hundred forty".