21957414503 has 2 divisors, whose sum is σ = 21957414504. Its totient is φ = 21957414502.

The previous prime is 21957414487. The next prime is 21957414533. The reversal of 21957414503 is 30541475912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21957414503 - 2⁴ = 21957414487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21957414533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10978707251 + 10978707252.

It is an arithmetic number, because the mean of its divisors is an integer number (10978707252).

Almost surely, 2^21957414503 is an apocalyptic number.

21957414503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21957414503 is an equidigital number, since it uses as much as digits as its factorization.

21957414503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 21957414503 in words is "twenty-one billion, nine hundred fifty-seven million, four hundred fourteen thousand, five hundred three".