21427425695 has 8 divisors (see below), whose sum is σ = 27690827136. Its totient is φ = 15823329696.

The previous prime is 21427425671. The next prime is 21427425707. The reversal of 21427425695 is 59652472412.

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 21427425695 - 2¹⁰ = 21427424671 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 164826287 + ... + 164826416.

It is an arithmetic number, because the mean of its divisors is an integer number (3461353392).

Almost surely, 2^21427425695 is an apocalyptic number.

21427425695 is a deficient number, since it is larger than the sum of its proper divisors (6263401441).

21427425695 is a wasteful number, since it uses less digits than its factorization.

21427425695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329652721.

The product of its digits is 1209600, while the sum is 47.

The spelling of 21427425695 in words is "twenty-one billion, four hundred twenty-seven million, four hundred twenty-five thousand, six hundred ninety-five".