21593483 has 2 divisors, whose sum is σ = 21593484. Its totient is φ = 21593482.

The previous prime is 21593479. The next prime is 21593489. The reversal of 21593483 is 38439512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21593483 - 2² = 21593479 is a prime.

It is not a weakly prime, because it can be changed into another prime (21593489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10796741 + 10796742.

It is an arithmetic number, because the mean of its divisors is an integer number (10796742).

Almost surely, 2^21593483 is an apocalyptic number.

21593483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21593483 is an equidigital number, since it uses as much as digits as its factorization.

21593483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 21593483 is about 4646.8788449883. The cubic root of 21593483 is about 278.4673186491.

The spelling of 21593483 in words is "twenty-one million, five hundred ninety-three thousand, four hundred eighty-three".