21907203612822 has 80 divisors (see below), whose sum is σ = 54103014160272. Its totient is φ = 6570107873280.

The previous prime is 21907203612821. The next prime is 21907203612839. The reversal of 21907203612822 is 22821630270912.

21907203612822 is a `hidden beast` number, since 2 + 1 + 9 + 0 + 7 + 2 + 0 + 3 + 612 + 8 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21907203612821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63196243 + ... + 63541950.

Almost surely, 2^{21907203612822} is an apocalyptic number.

21907203612822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21907203612822 is an abundant number, since it is smaller than the sum of its proper divisors (32195810547450).

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

21907203612822 is a wasteful number, since it uses less digits than its factorization.

21907203612822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126738315 (or 126738306 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 21907203612822 in words is "twenty-one trillion, nine hundred seven billion, two hundred three million, six hundred twelve thousand, eight hundred twenty-two".