20634077 has 2 divisors, whose sum is σ = 20634078. Its totient is φ = 20634076.

The previous prime is 20634067. The next prime is 20634101. The reversal of 20634077 is 77043602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10686361 + 9947716 = 3269^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20634077 - 2²⁴ = 3856861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20634017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10317038 + 10317039.

It is an arithmetic number, because the mean of its divisors is an integer number (10317039).

Almost surely, 2^20634077 is an apocalyptic number.

It is an amenable number.

20634077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20634077 is an equidigital number, since it uses as much as digits as its factorization.

20634077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20634077 is about 4542.4747660279. The cubic root of 20634077 is about 274.2805525003.

Adding to 20634077 its reverse (77043602), we get a palindrome (97677679).

The spelling of 20634077 in words is "twenty million, six hundred thirty-four thousand, seventy-seven".