21727377762 has 80 divisors (see below), whose sum is σ = 47171317632. Its totient is φ = 6666948000.

The previous prime is 21727377647. The next prime is 21727377803. The reversal of 21727377762 is 26777372712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28930887 + ... + 28931637.

Almost surely, 2^21727377762 is an apocalyptic number.

21727377762 is an abundant number, since it is smaller than the sum of its proper divisors (25443939870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21727377762 is an frugal number, since it uses more digits than its factorization.

21727377762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 812 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 51.

The spelling of 21727377762 in words is "twenty-one billion, seven hundred twenty-seven million, three hundred seventy-seven thousand, seven hundred sixty-two".