20673593 has 2 divisors, whose sum is σ = 20673594. Its totient is φ = 20673592.

The previous prime is 20673563. The next prime is 20673599. The reversal of 20673593 is 39537602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 6775609 = 3728^2 + 2603^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673593 - 2¹² = 20669497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20673599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336796 + 10336797.

It is an arithmetic number, because the mean of its divisors is an integer number (10336797).

Almost surely, 2^20673593 is an apocalyptic number.

It is an amenable number.

20673593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20673593 is an equidigital number, since it uses as much as digits as its factorization.

20673593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20673593 is about 4546.8222969454. The cubic root of 20673593 is about 274.4555309886.

The spelling of 20673593 in words is "twenty million, six hundred seventy-three thousand, five hundred ninety-three".