21003629963 has 2 divisors, whose sum is σ = 21003629964. Its totient is φ = 21003629962.

The previous prime is 21003629917. The next prime is 21003630013. The reversal of 21003629963 is 36992630012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21003629963 - 2²⁸ = 20735194507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21003629963.

It is not a weakly prime, because it can be changed into another prime (21003629063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501814981 + 10501814982.

It is an arithmetic number, because the mean of its divisors is an integer number (10501814982).

Almost surely, 2^21003629963 is an apocalyptic number.

21003629963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003629963 is an equidigital number, since it uses as much as digits as its factorization.

21003629963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 21003629963 in words is "twenty-one billion, three million, six hundred twenty-nine thousand, nine hundred sixty-three".