23885450820 has 324 divisors, whose sum is σ = 92644156332. Its totient is φ = 4962988800.

The previous prime is 23885450801. The next prime is 23885450821. The reversal of 23885450820 is 2805458832.

23885450820 is a `hidden beast` number, since 2 + 3 + 88 + 545 + 0 + 8 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11488409856 + 12397040964 = 107184^2 + 111342^2 .

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

It is not an unprimeable number, because it can be changed into a prime (23885450821) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1056030 + ... + 1078410.

Almost surely, 2^23885450820 is an apocalyptic number.

23885450820 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 23885450820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46322078166).

23885450820 is an abundant number, since it is smaller than the sum of its proper divisors (68758705512).

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

23885450820 is a wasteful number, since it uses less digits than its factorization.

23885450820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22432 (or 22409 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 23885450820 in words is "twenty-three billion, eight hundred eighty-five million, four hundred fifty thousand, eight hundred twenty".