21513342456502 has 24 divisors (see below), whose sum is σ = 34946845005816. Its totient is φ = 9928218920256.

The previous prime is 21513342456491. The next prime is 21513342456503. The reversal of 21513342456502 is 20565424331512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513342456503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56298 + ... + 6559714.

It is an arithmetic number, because the mean of its divisors is an integer number (1456118541909).

Almost surely, 2^{21513342456502} is an apocalyptic number.

21513342456502 is a deficient number, since it is larger than the sum of its proper divisors (13433502549314).

21513342456502 is a wasteful number, since it uses less digits than its factorization.

21513342456502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513232 (or 6513219 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 21513342456502 in words is "twenty-one trillion, five hundred thirteen billion, three hundred forty-two million, four hundred fifty-six thousand, five hundred two".