21670264435 has 16 divisors (see below), whose sum is σ = 26815021632. Its totient is φ = 16801344000.

The previous prime is 21670264433. The next prime is 21670264439. The reversal of 21670264435 is 53446207612.

It is not a de Polignac number, because 21670264435 - 2¹ = 21670264433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21670264433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319074 + ... + 380983.

It is an arithmetic number, because the mean of its divisors is an integer number (1675938852).

Almost surely, 2^21670264435 is an apocalyptic number.

21670264435 is a deficient number, since it is larger than the sum of its proper divisors (5144757197).

21670264435 is a wasteful number, since it uses less digits than its factorization.

21670264435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700254.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 21670264435 in words is "twenty-one billion, six hundred seventy million, two hundred sixty-four thousand, four hundred thirty-five".