20037449 has 2 divisors, whose sum is σ = 20037450. Its totient is φ = 20037448.

The previous prime is 20037443. The next prime is 20037467. The reversal of 20037449 is 94473002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17808400 + 2229049 = 4220^2 + 1493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20037449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20037443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10018724 + 10018725.

It is an arithmetic number, because the mean of its divisors is an integer number (10018725).

Almost surely, 2^20037449 is an apocalyptic number.

It is an amenable number.

20037449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20037449 is an equidigital number, since it uses as much as digits as its factorization.

20037449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20037449 is about 4476.3209223647. The cubic root of 20037449 is about 271.6110764012.

The spelling of 20037449 in words is "twenty million, thirty-seven thousand, four hundred forty-nine".