21957474503 has 2 divisors, whose sum is σ = 21957474504. Its totient is φ = 21957474502.

The previous prime is 21957474493. The next prime is 21957474527. The reversal of 21957474503 is 30547475912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21957474503 - 2⁸ = 21957474247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21957414503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10978737251 + 10978737252.

It is an arithmetic number, because the mean of its divisors is an integer number (10978737252).

Almost surely, 2^21957474503 is an apocalyptic number.

21957474503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21957474503 is an equidigital number, since it uses as much as digits as its factorization.

21957474503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 21957474503 in words is "twenty-one billion, nine hundred fifty-seven million, four hundred seventy-four thousand, five hundred three".