21695104669 has 16 divisors (see below), whose sum is σ = 25153839360. Its totient is φ = 18327576960.

The previous prime is 21695104667. The next prime is 21695104679. The reversal of 21695104669 is 96640159612.

It is not a de Polignac number, because 21695104669 - 2¹ = 21695104667 is a prime.

It is a super-2 number, since 2×21695104669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21695104661) 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, 137767 + ... + 249739.

It is an arithmetic number, because the mean of its divisors is an integer number (1572114960).

Almost surely, 2^21695104669 is an apocalyptic number.

It is an amenable number.

21695104669 is a deficient number, since it is larger than the sum of its proper divisors (3458734691).

21695104669 is a wasteful number, since it uses less digits than its factorization.

21695104669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112380.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 21695104669 in words is "twenty-one billion, six hundred ninety-five million, one hundred four thousand, six hundred sixty-nine".