21853297704 has 32 divisors (see below), whose sum is σ = 62437993920. Its totient is φ = 6243799296.

The previous prime is 21853297673. The next prime is 21853297709. The reversal of 21853297704 is 40779235812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21853297709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65039409 + ... + 65039744.

It is an arithmetic number, because the mean of its divisors is an integer number (1951187310).

Almost surely, 2^21853297704 is an apocalyptic number.

21853297704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21853297704 is an abundant number, since it is smaller than the sum of its proper divisors (40584696216).

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

21853297704 is a wasteful number, since it uses less digits than its factorization.

21853297704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130079169 (or 130079165 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 21853297704 in words is "twenty-one billion, eight hundred fifty-three million, two hundred ninety-seven thousand, seven hundred four".