21968834037 has 16 divisors (see below), whose sum is σ = 30836866560. Its totient is φ = 13873516272.

The previous prime is 21968834033. The next prime is 21968834051. The reversal of 21968834037 is 73043886912.

It is not a de Polignac number, because 21968834037 - 2² = 21968834033 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21968834033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724258 + ... + 753980.

It is an arithmetic number, because the mean of its divisors is an integer number (1927304160).

Almost surely, 2^21968834037 is an apocalyptic number.

It is an amenable number.

21968834037 is a deficient number, since it is larger than the sum of its proper divisors (8868032523).

21968834037 is a wasteful number, since it uses less digits than its factorization.

21968834037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42712.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 21968834037 in words is "twenty-one billion, nine hundred sixty-eight million, eight hundred thirty-four thousand, thirty-seven".