21023309003 has 2 divisors, whose sum is σ = 21023309004. Its totient is φ = 21023309002.

The previous prime is 21023308997. The next prime is 21023309023. The reversal of 21023309003 is 30090332012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023309003 - 2¹⁶ = 21023243467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21023309003.

It is not a weakly prime, because it can be changed into another prime (21023309023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511654501 + 10511654502.

It is an arithmetic number, because the mean of its divisors is an integer number (10511654502).

Almost surely, 2^21023309003 is an apocalyptic number.

21023309003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023309003 is an equidigital number, since it uses as much as digits as its factorization.

21023309003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The spelling of 21023309003 in words is "twenty-one billion, twenty-three million, three hundred nine thousand, three".