20342533 has 2 divisors, whose sum is σ = 20342534. Its totient is φ = 20342532.

The previous prime is 20342527. The next prime is 20342537. The reversal of 20342533 is 33524302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 74529 = 4502^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 20342533 - 2⁵ = 20342501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20342537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171266 + 10171267.

It is an arithmetic number, because the mean of its divisors is an integer number (10171267).

Almost surely, 2^20342533 is an apocalyptic number.

It is an amenable number.

20342533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342533 is an equidigital number, since it uses as much as digits as its factorization.

20342533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 20342533 is about 4510.2697258590. The cubic root of 20342533 is about 272.9826275805.

Adding to 20342533 its reverse (33524302), we get a palindrome (53866835).

The spelling of 20342533 in words is "twenty million, three hundred forty-two thousand, five hundred thirty-three".