21725910735 has 16 divisors (see below), whose sum is σ = 34776138336. Its totient is φ = 11582258688.

The previous prime is 21725910719. The next prime is 21725910743. The reversal of 21725910735 is 53701952712.

It is not a de Polignac number, because 21725910735 - 2⁴ = 21725910719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269014 + ... + 340323.

It is an arithmetic number, because the mean of its divisors is an integer number (2173508646).

Almost surely, 2^21725910735 is an apocalyptic number.

21725910735 is a deficient number, since it is larger than the sum of its proper divisors (13050227601).

21725910735 is a wasteful number, since it uses less digits than its factorization.

21725910735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611722.

The product of its (nonzero) digits is 132300, while the sum is 42.

The spelling of 21725910735 in words is "twenty-one billion, seven hundred twenty-five million, nine hundred ten thousand, seven hundred thirty-five".