21727209848 has 32 divisors (see below), whose sum is σ = 41421002160. Its totient is φ = 10681735680.

The previous prime is 21727209811. The next prime is 21727209853. The reversal of 21727209848 is 84890272712.

It is a junction number, because it is equal to n+sod(n) for n = 21727209796 and 21727209805.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1798115 + ... + 1810157.

Almost surely, 2^21727209848 is an apocalyptic number.

It is an amenable number.

21727209848 is a deficient number, since it is larger than the sum of its proper divisors (19693792312).

21727209848 is a wasteful number, since it uses less digits than its factorization.

21727209848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15807 (or 15803 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 21727209848 in words is "twenty-one billion, seven hundred twenty-seven million, two hundred nine thousand, eight hundred forty-eight".