20377673 has 2 divisors, whose sum is σ = 20377674. Its totient is φ = 20377672.

The previous prime is 20377667. The next prime is 20377681. The reversal of 20377673 is 37677302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18731584 + 1646089 = 4328^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 20377673 - 2¹⁶ = 20312137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20377603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188836 + 10188837.

It is an arithmetic number, because the mean of its divisors is an integer number (10188837).

Almost surely, 2^20377673 is an apocalyptic number.

It is an amenable number.

20377673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20377673 is an equidigital number, since it uses as much as digits as its factorization.

20377673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 35.

The square root of 20377673 is about 4514.1635991621. The cubic root of 20377673 is about 273.1397219363.

The spelling of 20377673 in words is "twenty million, three hundred seventy-seven thousand, six hundred seventy-three".