23951642220 has 192 divisors, whose sum is σ = 83913338880. Its totient is φ = 5619110400.

The previous prime is 23951642219. The next prime is 23951642257. The reversal of 23951642220 is 2224615932.

23951642220 is a `hidden beast` number, since 2 + 3 + 9 + 5 + 1 + 642 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119104 + ... + 249176.

It is an arithmetic number, because the mean of its divisors is an integer number (437048640).

Almost surely, 2^23951642220 is an apocalyptic number.

23951642220 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 23951642220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41956669440).

23951642220 is an abundant number, since it is smaller than the sum of its proper divisors (59961696660).

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

23951642220 is a wasteful number, since it uses less digits than its factorization.

23951642220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130133 (or 130125 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 23951642220 in words is "twenty-three billion, nine hundred fifty-one million, six hundred forty-two thousand, two hundred twenty".