21869406265 has 8 divisors (see below), whose sum is σ = 29992328640. Its totient is φ = 14996164272.

The previous prime is 21869406241. The next prime is 21869406281. The reversal of 21869406265 is 56260496812.

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 21869406265 - 2¹¹ = 21869404217 is a prime.

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, 312420055 + ... + 312420124.

It is an arithmetic number, because the mean of its divisors is an integer number (3749041080).

Almost surely, 2^21869406265 is an apocalyptic number.

It is an amenable number.

21869406265 is a deficient number, since it is larger than the sum of its proper divisors (8122922375).

21869406265 is an equidigital number, since it uses as much as digits as its factorization.

21869406265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624840191.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 21869406265 in words is "twenty-one billion, eight hundred sixty-nine million, four hundred six thousand, two hundred sixty-five".