21274628503 has 2 divisors, whose sum is σ = 21274628504. Its totient is φ = 21274628502.

The previous prime is 21274628471. The next prime is 21274628561. The reversal of 21274628503 is 30582647212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21274628503 - 2⁵ = 21274628471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21274628593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637314251 + 10637314252.

It is an arithmetic number, because the mean of its divisors is an integer number (10637314252).

Almost surely, 2^21274628503 is an apocalyptic number.

21274628503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21274628503 is an equidigital number, since it uses as much as digits as its factorization.

21274628503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 21274628503 in words is "twenty-one billion, two hundred seventy-four million, six hundred twenty-eight thousand, five hundred three".