21814857711 has 14 divisors (see below), whose sum is σ = 32707325480. Its totient is φ = 14543237988.

The previous prime is 21814857677. The next prime is 21814857719. The reversal of 21814857711 is 11775841812.

21814857711 is a `hidden beast` number, since 21 + 8 + 1 + 48 + 577 + 11 = 666.

It is not a de Polignac number, because 21814857711 - 2⁹ = 21814857199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814857719) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 14961451 + ... + 14962908.

Almost surely, 2^21814857711 is an apocalyptic number.

21814857711 is a deficient number, since it is larger than the sum of its proper divisors (10892467769).

21814857711 is an frugal number, since it uses more digits than its factorization.

21814857711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29924377 (or 29924362 counting only the distinct ones).

The product of its digits is 125440, while the sum is 45.

The spelling of 21814857711 in words is "twenty-one billion, eight hundred fourteen million, eight hundred fifty-seven thousand, seven hundred eleven".