23730161640 has 128 divisors (see below), whose sum is σ = 73436976000. Its totient is φ = 6129865728.

The previous prime is 23730161629. The next prime is 23730161681. The reversal of 23730161640 is 4616103732.

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, 1005091 + ... + 1028429.

It is an arithmetic number, because the mean of its divisors is an integer number (573726375).

Almost surely, 2^23730161640 is an apocalyptic number.

23730161640 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 23730161640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36718488000).

23730161640 is an abundant number, since it is smaller than the sum of its proper divisors (49706814360).

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

23730161640 is a wasteful number, since it uses less digits than its factorization.

23730161640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23619 (or 23615 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 23730161640 in words is "twenty-three billion, seven hundred thirty million, one hundred sixty-one thousand, six hundred forty".