21025027675 has 6 divisors (see below), whose sum is σ = 26071034348. Its totient is φ = 16820022120.

The previous prime is 21025027643. The next prime is 21025027687. The reversal of 21025027675 is 57672052012.

It is not a de Polignac number, because 21025027675 - 2⁵ = 21025027643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 420500529 + ... + 420500578.

Almost surely, 2^21025027675 is an apocalyptic number.

21025027675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21025027675 is a deficient number, since it is larger than the sum of its proper divisors (5046006673).

21025027675 is an equidigital number, since it uses as much as digits as its factorization.

21025027675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841001117 (or 841001112 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

Adding to 21025027675 its reverse (57672052012), we get a palindrome (78697079687).

The spelling of 21025027675 in words is "twenty-one billion, twenty-five million, twenty-seven thousand, six hundred seventy-five".