20313437 has 2 divisors, whose sum is σ = 20313438. Its totient is φ = 20313436.

The previous prime is 20313421. The next prime is 20313467. The reversal of 20313437 is 73431302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19412836 + 900601 = 4406^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313437 - 2⁴ = 20313421 is a prime.

It is a super-3 number, since 3×20313437³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_1289210 and since 20313437 and 1289210 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156718 + 10156719.

It is an arithmetic number, because the mean of its divisors is an integer number (10156719).

Almost surely, 2^20313437 is an apocalyptic number.

It is an amenable number.

20313437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313437 is an equidigital number, since it uses as much as digits as its factorization.

20313437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20313437 is about 4507.0430439480. The cubic root of 20313437 is about 272.8524161269.

Adding to 20313437 its reverse (73431302), we get a palindrome (93744739).

The spelling of 20313437 in words is "twenty million, three hundred thirteen thousand, four hundred thirty-seven".