21022000903 has 2 divisors, whose sum is σ = 21022000904. Its totient is φ = 21022000902.

The previous prime is 21022000861. The next prime is 21022001029. The reversal of 21022000903 is 30900022012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022000903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022004903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511000451 + 10511000452.

It is an arithmetic number, because the mean of its divisors is an integer number (10511000452).

Almost surely, 2^21022000903 is an apocalyptic number.

21022000903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022000903 is an equidigital number, since it uses as much as digits as its factorization.

21022000903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21022000903 its reverse (30900022012), we get a palindrome (51922022915).

The spelling of 21022000903 in words is "twenty-one billion, twenty-two million, nine hundred three", and thus it is an aban number.