21003350629 has 2 divisors, whose sum is σ = 21003350630. Its totient is φ = 21003350628.

The previous prime is 21003350579. The next prime is 21003350639. The reversal of 21003350629 is 92605330012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20851937604 + 151413025 = 144402^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003350629 - 2¹⁵ = 21003317861 is a prime.

It is a super-2 number, since 2×21003350629² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003350629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003350639) 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, 10501675314 + 10501675315.

It is an arithmetic number, because the mean of its divisors is an integer number (10501675315).

Almost surely, 2^21003350629 is an apocalyptic number.

It is an amenable number.

21003350629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003350629 is an equidigital number, since it uses as much as digits as its factorization.

21003350629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 21003350629 in words is "twenty-one billion, three million, three hundred fifty thousand, six hundred twenty-nine".