23421237840 has 480 divisors, whose sum is σ = 105611740416. Its totient is φ = 4492247040.

The previous prime is 23421237809. The next prime is 23421237869. The reversal of 23421237840 is 4873212432.

It is a happy number.

23421237840 is a `hidden beast` number, since 2 + 34 + 212 + 378 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 23421237795 and 23421237804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 704472 + ... + 736968.

Almost surely, 2^23421237840 is an apocalyptic number.

23421237840 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 23421237840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52805870208).

23421237840 is an abundant number, since it is smaller than the sum of its proper divisors (82190502576).

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

23421237840 is a wasteful number, since it uses less digits than its factorization.

23421237840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32547 (or 32538 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 23421237840 in words is "twenty-three billion, four hundred twenty-one million, two hundred thirty-seven thousand, eight hundred forty".