23139829440 has 896 divisors, whose sum is σ = 105826560000. Its totient is φ = 4622303232.

The previous prime is 23139829439. The next prime is 23139829457. The reversal of 23139829440 is 4492893132.

23139829440 is a `hidden beast` number, since 2 + 313 + 9 + 8 + 294 + 40 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14937786 + ... + 14939334.

It is an arithmetic number, because the mean of its divisors is an integer number (118110000).

Almost surely, 2^23139829440 is an apocalyptic number.

23139829440 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 23139829440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52913280000).

23139829440 is an abundant number, since it is smaller than the sum of its proper divisors (82686730560).

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

23139829440 is a wasteful number, since it uses less digits than its factorization.

23139829440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 23139829440 in words is "twenty-three billion, one hundred thirty-nine million, eight hundred twenty-nine thousand, four hundred forty".