20329237 has 2 divisors, whose sum is σ = 20329238. Its totient is φ = 20329236.

The previous prime is 20329201. The next prime is 20329247. The reversal of 20329237 is 73292302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15689521 + 4639716 = 3961^2 + 2154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20329237 - 2⁷ = 20329109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20329247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164618 + 10164619.

It is an arithmetic number, because the mean of its divisors is an integer number (10164619).

Almost surely, 2^20329237 is an apocalyptic number.

It is an amenable number.

20329237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20329237 is an equidigital number, since it uses as much as digits as its factorization.

20329237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20329237 is about 4508.7955154342. The cubic root of 20329237 is about 272.9231402643.

The spelling of 20329237 in words is "twenty million, three hundred twenty-nine thousand, two hundred thirty-seven".