21916907757 has 12 divisors (see below), whose sum is σ = 31659076800. Its totient is φ = 14610662088.

The previous prime is 21916907743. The next prime is 21916907843. The reversal of 21916907757 is 75770961912.

It is a happy number.

It is not a de Polignac number, because 21916907757 - 2⁶ = 21916907693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21916907717) 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, 316828 + ... + 379754.

It is an arithmetic number, because the mean of its divisors is an integer number (2638256400).

Almost surely, 2^21916907757 is an apocalyptic number.

It is an amenable number.

21916907757 is a deficient number, since it is larger than the sum of its proper divisors (9742169043).

21916907757 is a wasteful number, since it uses less digits than its factorization.

21916907757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101632 (or 101629 counting only the distinct ones).

The product of its (nonzero) digits is 1666980, while the sum is 54.

The spelling of 21916907757 in words is "twenty-one billion, nine hundred sixteen million, nine hundred seven thousand, seven hundred fifty-seven".