21507600463540 has 48 divisors (see below), whose sum is σ = 46653145297920. Its totient is φ = 8320126717440.

The previous prime is 21507600463537. The next prime is 21507600463597. The reversal of 21507600463540 is 4536400670512.

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 15 ways as a sum of consecutive naturals, for example, 10284325 + ... + 12197644.

It is an arithmetic number, because the mean of its divisors is an integer number (971940527040).

Almost surely, 2^{21507600463540} is an apocalyptic number.

21507600463540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21507600463540 is an abundant number, since it is smaller than the sum of its proper divisors (25145544834380).

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

21507600463540 is a wasteful number, since it uses less digits than its factorization.

21507600463540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22483552 (or 22483550 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 21507600463540 in words is "twenty-one trillion, five hundred seven billion, six hundred million, four hundred sixty-three thousand, five hundred forty".