21572898259 has 4 divisors (see below), whose sum is σ = 23534070840. Its totient is φ = 19611725680.

The previous prime is 21572898253. The next prime is 21572898283. The reversal of 21572898259 is 95289827512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21572898259 - 2³ = 21572898251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21572898251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980586274 + ... + 980586295.

It is an arithmetic number, because the mean of its divisors is an integer number (5883517710).

Almost surely, 2^21572898259 is an apocalyptic number.

21572898259 is a deficient number, since it is larger than the sum of its proper divisors (1961172581).

21572898259 is a wasteful number, since it uses less digits than its factorization.

21572898259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961172580.

The product of its digits is 7257600, while the sum is 58.

The spelling of 21572898259 in words is "twenty-one billion, five hundred seventy-two million, eight hundred ninety-eight thousand, two hundred fifty-nine".