20347073 has 2 divisors, whose sum is σ = 20347074. Its totient is φ = 20347072.

The previous prime is 20347069. The next prime is 20347121. The reversal of 20347073 is 37074302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 7907344 = 3527^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 20347073 - 2² = 20347069 is a prime.

It is not a weakly prime, because it can be changed into another prime (20347573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173536 + 10173537.

It is an arithmetic number, because the mean of its divisors is an integer number (10173537).

Almost surely, 2^20347073 is an apocalyptic number.

It is an amenable number.

20347073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20347073 is an equidigital number, since it uses as much as digits as its factorization.

20347073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 20347073 is about 4510.7729936232. The cubic root of 20347073 is about 273.0029339494.

The spelling of 20347073 in words is "twenty million, three hundred forty-seven thousand, seventy-three".