21633990307 has 2 divisors, whose sum is σ = 21633990308. Its totient is φ = 21633990306.

The previous prime is 21633990293. The next prime is 21633990337. The reversal of 21633990307 is 70309933612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21633990307 - 2¹⁵ = 21633957539 is a prime.

It is not a weakly prime, because it can be changed into another prime (21633990337) 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 as a sum of consecutive naturals, namely, 10816995153 + 10816995154.

It is an arithmetic number, because the mean of its divisors is an integer number (10816995154).

Almost surely, 2^21633990307 is an apocalyptic number.

21633990307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21633990307 is an equidigital number, since it uses as much as digits as its factorization.

21633990307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 43.

The spelling of 21633990307 in words is "twenty-one billion, six hundred thirty-three million, nine hundred ninety thousand, three hundred seven".