21935607946 has 32 divisors (see below), whose sum is σ = 38969124480. Its totient is φ = 9060811200.

The previous prime is 21935607929. The next prime is 21935607971. The reversal of 21935607946 is 64970653912.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21935607893 and 21935607902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184516 + ... + 279136.

It is an arithmetic number, because the mean of its divisors is an integer number (1217785140).

Almost surely, 2^21935607946 is an apocalyptic number.

21935607946 is a deficient number, since it is larger than the sum of its proper divisors (17033516534).

21935607946 is a wasteful number, since it uses less digits than its factorization.

21935607946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95230.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 21935607946 in words is "twenty-one billion, nine hundred thirty-five million, six hundred seven thousand, nine hundred forty-six".