21933958873 has 2 divisors, whose sum is σ = 21933958874. Its totient is φ = 21933958872.

The previous prime is 21933958819. The next prime is 21933958877. The reversal of 21933958873 is 37885933912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18367838784 + 3566120089 = 135528^2 + 59717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21933958873 is a prime.

It is not a weakly prime, because it can be changed into another prime (21933958877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10966979436 + 10966979437.

It is an arithmetic number, because the mean of its divisors is an integer number (10966979437).

Almost surely, 2^21933958873 is an apocalyptic number.

It is an amenable number.

21933958873 is a deficient number, since it is larger than the sum of its proper divisors (1).

21933958873 is an equidigital number, since it uses as much as digits as its factorization.

21933958873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The spelling of 21933958873 in words is "twenty-one billion, nine hundred thirty-three million, nine hundred fifty-eight thousand, eight hundred seventy-three".