21308140873530 has 96 divisors (see below), whose sum is σ = 63378371347200. Its totient is φ = 4865605065216.

The previous prime is 21308140873529. The next prime is 21308140873531. The reversal of 21308140873530 is 3537804180312.

21308140873530 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 8 + 1 + 40 + 8 + 73 + 530 = 666.

It is an interprime number because it is at equal distance from previous prime (21308140873529) and next prime (21308140873531).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (21308140873531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16124710 + ... + 17396049.

It is an arithmetic number, because the mean of its divisors is an integer number (660191368200).

Almost surely, 2^{21308140873530} is an apocalyptic number.

21308140873530 is an abundant number, since it is smaller than the sum of its proper divisors (42070230473670).

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

21308140873530 is a wasteful number, since it uses less digits than its factorization.

21308140873530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33521788 (or 33521785 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 21308140873530 in words is "twenty-one trillion, three hundred eight billion, one hundred forty million, eight hundred seventy-three thousand, five hundred thirty".