21727849795 has 32 divisors (see below), whose sum is σ = 26530882560. Its totient is φ = 17081001600.

The previous prime is 21727849777. The next prime is 21727849813. The reversal of 21727849795 is 59794872712.

It is an interprime number because it is at equal distance from previous prime (21727849777) and next prime (21727849813).

It is not a de Polignac number, because 21727849795 - 2⁷ = 21727849667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49046844 + ... + 49047286.

It is an arithmetic number, because the mean of its divisors is an integer number (829090080).

Almost surely, 2^21727849795 is an apocalyptic number.

21727849795 is a deficient number, since it is larger than the sum of its proper divisors (4803032765).

21727849795 is a wasteful number, since it uses less digits than its factorization.

21727849795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its digits is 17781120, while the sum is 61.

The spelling of 21727849795 in words is "twenty-one billion, seven hundred twenty-seven million, eight hundred forty-nine thousand, seven hundred ninety-five".