21858114692 has 12 divisors (see below), whose sum is σ = 38253719196. Its totient is φ = 10928480640.

The previous prime is 21858114673. The next prime is 21858114749. The reversal of 21858114692 is 29641185812.

It can be written as a sum of positive squares in 2 ways, for example, as 9180705856 + 12677408836 = 95816^2 + 112594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52409 + ... + 215552.

It is an arithmetic number, because the mean of its divisors is an integer number (3187809933).

Almost surely, 2^21858114692 is an apocalyptic number.

It is an amenable number.

21858114692 is a deficient number, since it is larger than the sum of its proper divisors (16395604504).

21858114692 is a wasteful number, since it uses less digits than its factorization.

21858114692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288358 (or 288356 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The spelling of 21858114692 in words is "twenty-one billion, eight hundred fifty-eight million, one hundred fourteen thousand, six hundred ninety-two".