21935394126 has 24 divisors (see below), whose sum is σ = 47612035224. Its totient is φ = 7298667600.

The previous prime is 21935394109. The next prime is 21935394127. The reversal of 21935394126 is 62149353912.

21935394126 is a `hidden beast` number, since 2 + 1 + 93 + 539 + 4 + 1 + 26 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21935394127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1083900 + ... + 1103951.

It is an arithmetic number, because the mean of its divisors is an integer number (1983834801).

Almost surely, 2^21935394126 is an apocalyptic number.

21935394126 is an abundant number, since it is smaller than the sum of its proper divisors (25676641098).

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

21935394126 is a wasteful number, since it uses less digits than its factorization.

21935394126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188416 (or 2188413 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The spelling of 21935394126 in words is "twenty-one billion, nine hundred thirty-five million, three hundred ninety-four thousand, one hundred twenty-six".