20545937 has 2 divisors, whose sum is σ = 20545938. Its totient is φ = 20545936.

The previous prime is 20545919. The next prime is 20545939. The reversal of 20545937 is 73954502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18800896 + 1745041 = 4336^2 + 1321^2 .

It is a cyclic number.

It is not a de Polignac number, because 20545937 - 2¹² = 20541841 is a prime.

Together with 20545939, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20545897 and 20545906.

It is not a weakly prime, because it can be changed into another prime (20545939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272968 + 10272969.

It is an arithmetic number, because the mean of its divisors is an integer number (10272969).

Almost surely, 2^20545937 is an apocalyptic number.

It is an amenable number.

20545937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545937 is an equidigital number, since it uses as much as digits as its factorization.

20545937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 20545937 is about 4532.7626233898. The cubic root of 20545937 is about 273.8894584909.

The spelling of 20545937 in words is "twenty million, five hundred forty-five thousand, nine hundred thirty-seven".