23621452540 has 144 divisors (see below), whose sum is σ = 59707355904. Its totient is φ = 7818854400.

The previous prime is 23621452529. The next prime is 23621452579. The reversal of 23621452540 is 4525412632.

It is a junction number, because it is equal to n+sod(n) for n = 23621452496 and 23621452505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19472974 + ... + 19474186.

It is an arithmetic number, because the mean of its divisors is an integer number (414634416).

Almost surely, 2^23621452540 is an apocalyptic number.

23621452540 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 23621452540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29853677952).

23621452540 is an abundant number, since it is smaller than the sum of its proper divisors (36085903364).

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

23621452540 is a wasteful number, since it uses less digits than its factorization.

23621452540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 23621452540 in words is "twenty-three billion, six hundred twenty-one million, four hundred fifty-two thousand, five hundred forty".