20313743 has 2 divisors, whose sum is σ = 20313744. Its totient is φ = 20313742.

The previous prime is 20313731. The next prime is 20313749. The reversal of 20313743 is 34731302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156871 + 10156872.

It is an arithmetic number, because the mean of its divisors is an integer number (10156872).

Almost surely, 2^20313743 is an apocalyptic number.

20313743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313743 is an equidigital number, since it uses as much as digits as its factorization.

20313743 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 20313743 is about 4507.0769906892. The cubic root of 20313743 is about 272.8537861958.

The spelling of 20313743 in words is "twenty million, three hundred thirteen thousand, seven hundred forty-three".