23321516540 has 48 divisors (see below), whose sum is σ = 58405197312. Its totient is φ = 7648297536.

The previous prime is 23321516483. The next prime is 23321516567. The reversal of 23321516540 is 4561512332.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23321516497 and 23321516506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3618134 + ... + 3624573.

It is an arithmetic number, because the mean of its divisors is an integer number (1216774944).

Almost surely, 2^23321516540 is an apocalyptic number.

23321516540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23321516540 is an abundant number, since it is smaller than the sum of its proper divisors (35083680772).

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

23321516540 is a wasteful number, since it uses less digits than its factorization.

23321516540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242746 (or 7242744 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 23321516540 in words is "twenty-three billion, three hundred twenty-one million, five hundred sixteen thousand, five hundred forty".