21327711886 has 32 divisors (see below), whose sum is σ = 36094722048. Its totient is φ = 9383821920.

The previous prime is 21327711851. The next prime is 21327711893. The reversal of 21327711886 is 68811772312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143470 + ... + 251473.

It is an arithmetic number, because the mean of its divisors is an integer number (1127960064).

Almost surely, 2^21327711886 is an apocalyptic number.

21327711886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21327711886 is a deficient number, since it is larger than the sum of its proper divisors (14767010162).

21327711886 is a wasteful number, since it uses less digits than its factorization.

21327711886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395056.

The product of its digits is 225792, while the sum is 46.

The spelling of 21327711886 in words is "twenty-one billion, three hundred twenty-seven million, seven hundred eleven thousand, eight hundred eighty-six".