21302812735 has 8 divisors (see below), whose sum is σ = 25565569200. Its totient is φ = 17040787584.

The previous prime is 21302812723. The next prime is 21302812747. The reversal of 21302812735 is 53721820312.

It is an interprime number because it is at equal distance from previous prime (21302812723) and next prime (21302812747).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21302812735 - 2⁷ = 21302812607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21302812735.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116557 + ... + 237046.

It is an arithmetic number, because the mean of its divisors is an integer number (3195696150).

Almost surely, 2^21302812735 is an apocalyptic number.

21302812735 is a deficient number, since it is larger than the sum of its proper divisors (4262756465).

21302812735 is a wasteful number, since it uses less digits than its factorization.

21302812735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365657.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 21302812735 in words is "twenty-one billion, three hundred two million, eight hundred twelve thousand, seven hundred thirty-five".