21025071995 has 8 divisors (see below), whose sum is σ = 26327046816. Its totient is φ = 16088750656.

The previous prime is 21025071983. The next prime is 21025072049. The reversal of 21025071995 is 59917052012.

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 21025071995 - 2⁶ = 21025071931 is a prime.

It is a Duffinian 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, 91413242 + ... + 91413471.

It is an arithmetic number, because the mean of its divisors is an integer number (3290880852).

Almost surely, 2^21025071995 is an apocalyptic number.

21025071995 is a deficient number, since it is larger than the sum of its proper divisors (5301974821).

21025071995 is a wasteful number, since it uses less digits than its factorization.

21025071995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182826741.

The product of its (nonzero) digits is 56700, while the sum is 41.

The spelling of 21025071995 in words is "twenty-one billion, twenty-five million, seventy-one thousand, nine hundred ninety-five".