20090537 has 2 divisors, whose sum is σ = 20090538. Its totient is φ = 20090536.

The previous prime is 20090527. The next prime is 20090561. The reversal of 20090537 is 73509002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 633616 = 4411^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 20090537 - 2¹⁰ = 20089513 is a prime.

It is equal to p_1276019 and since 20090537 and 1276019 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20090527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045268 + 10045269.

It is an arithmetic number, because the mean of its divisors is an integer number (10045269).

Almost surely, 2^20090537 is an apocalyptic number.

It is an amenable number.

20090537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20090537 is an equidigital number, since it uses as much as digits as its factorization.

20090537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 20090537 is about 4482.2468695956. The cubic root of 20090537 is about 271.8507372015.

Adding to 20090537 its reverse (73509002), we get a palindrome (93599539).

The spelling of 20090537 in words is "twenty million, ninety thousand, five hundred thirty-seven".