21853822835812 has 24 divisors (see below), whose sum is σ = 42343635025440. Its totient is φ = 9785293805760.

The previous prime is 21853822835783. The next prime is 21853822835839.

21853822835812 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3706547737 + ... + 3706553632.

It is an arithmetic number, because the mean of its divisors is an integer number (1764318126060).

Almost surely, 2^{21853822835812} is an apocalyptic number.

21853822835812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21853822835812 is a deficient number, since it is larger than the sum of its proper divisors (20489812189628).

21853822835812 is a wasteful number, since it uses less digits than its factorization.

21853822835812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7413101451 (or 7413101449 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 58.

The spelling of 21853822835812 in words is "twenty-one trillion, eight hundred fifty-three billion, eight hundred twenty-two million, eight hundred thirty-five thousand, eight hundred twelve".