20334557 has 2 divisors, whose sum is σ = 20334558. Its totient is φ = 20334556.

The previous prime is 20334551. The next prime is 20334577. The reversal of 20334557 is 75543302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18541636 + 1792921 = 4306^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 20334557 - 2¹⁴ = 20318173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20334551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167278 + 10167279.

It is an arithmetic number, because the mean of its divisors is an integer number (10167279).

Almost surely, 2^20334557 is an apocalyptic number.

It is an amenable number.

20334557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20334557 is an equidigital number, since it uses as much as digits as its factorization.

20334557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20334557 is about 4509.3854348459. The cubic root of 20334557 is about 272.9469454612.

Adding to 20334557 its reverse (75543302), we get a palindrome (95877859).

The spelling of 20334557 in words is "twenty million, three hundred thirty-four thousand, five hundred fifty-seven".