21333113929 has 2 divisors, whose sum is σ = 21333113930. Its totient is φ = 21333113928.

The previous prime is 21333113897. The next prime is 21333114001. The reversal of 21333113929 is 92931133312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19175325625 + 2157788304 = 138475^2 + 46452^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333113929 - 2⁵ = 21333113897 is a prime.

It is not a weakly prime, because it can be changed into another prime (21333143929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666556964 + 10666556965.

It is an arithmetic number, because the mean of its divisors is an integer number (10666556965).

Almost surely, 2^21333113929 is an apocalyptic number.

It is an amenable number.

21333113929 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333113929 is an equidigital number, since it uses as much as digits as its factorization.

21333113929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 37.

The spelling of 21333113929 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirteen thousand, nine hundred twenty-nine".