21305460554502 has 16 divisors (see below), whose sum is σ = 42610978571520. Its totient is φ = 7101810607752.

The previous prime is 21305460554467. The next prime is 21305460554509. The reversal of 21305460554502 is 20545506450312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21305460554509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567783 + ... + 7439085.

It is an arithmetic number, because the mean of its divisors is an integer number (2663186160720).

Almost surely, 2^{21305460554502} is an apocalyptic number.

21305460554502 is an abundant number, since it is smaller than the sum of its proper divisors (21305518017018).

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

21305460554502 is a wasteful number, since it uses less digits than its factorization.

21305460554502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788547.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 21305460554502 in words is "twenty-one trillion, three hundred five billion, four hundred sixty million, five hundred fifty-four thousand, five hundred two".