21869085923 has 8 divisors (see below), whose sum is σ = 23158321200. Its totient is φ = 20580163840.

The previous prime is 21869085913. The next prime is 21869085971. The reversal of 21869085923 is 32958096812.

It is a Cunningham number, because it is equal to 147882²-1.

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 21869085923 - 2²² = 21864891619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21869085913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73943 + ... + 221823.

It is an arithmetic number, because the mean of its divisors is an integer number (2894790150).

Almost surely, 2^21869085923 is an apocalyptic number.

21869085923 is a deficient number, since it is larger than the sum of its proper divisors (1289235277).

21869085923 is a wasteful number, since it uses less digits than its factorization.

21869085923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156597.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 21869085923 in words is "twenty-one billion, eight hundred sixty-nine million, eighty-five thousand, nine hundred twenty-three".