21306642058485 has 480 divisors, whose sum is σ = 46329141957120. Its totient is φ = 9333873948672.

The previous prime is 21306642058417. The next prime is 21306642058489. The reversal of 21306642058485 is 58485024660312.

21306642058485 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 66 + 420 + 5 + 84 + 85 = 666.

It is not a de Polignac number, because 21306642058485 - 2¹⁷ = 21306641927413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21306642058489) by changing a digit.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 17224447287 + ... + 17224448523.

It is an arithmetic number, because the mean of its divisors is an integer number (96519045744).

Almost surely, 2^{21306642058485} is an apocalyptic number.

It is an amenable number.

21306642058485 is an abundant number, since it is smaller than the sum of its proper divisors (25022499898635).

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

21306642058485 is a wasteful number, since it uses less digits than its factorization.

21306642058485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 21306642058485 in words is "twenty-one trillion, three hundred six billion, six hundred forty-two million, fifty-eight thousand, four hundred eighty-five".