20115773 has 2 divisors, whose sum is σ = 20115774. Its totient is φ = 20115772.

The previous prime is 20115727. The next prime is 20115803. The reversal of 20115773 is 37751102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3485689 = 4078^2 + 1867^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115773 - 2²⁴ = 3338557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20115713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057886 + 10057887.

It is an arithmetic number, because the mean of its divisors is an integer number (10057887).

Almost surely, 2^20115773 is an apocalyptic number.

It is an amenable number.

20115773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115773 is an equidigital number, since it uses as much as digits as its factorization.

20115773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 20115773 is about 4485.0610921146. The cubic root of 20115773 is about 271.9645147263.

Adding to 20115773 its reverse (37751102), we get a palindrome (57866875).

The spelling of 20115773 in words is "twenty million, one hundred fifteen thousand, seven hundred seventy-three".