20073397 has 2 divisors, whose sum is σ = 20073398. Its totient is φ = 20073396.

The previous prime is 20073373. The next prime is 20073419. The reversal of 20073397 is 79337002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17230801 + 2842596 = 4151^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 20073397 - 2⁷ = 20073269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20073997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036698 + 10036699.

It is an arithmetic number, because the mean of its divisors is an integer number (10036699).

Almost surely, 2^20073397 is an apocalyptic number.

It is an amenable number.

20073397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20073397 is an equidigital number, since it uses as much as digits as its factorization.

20073397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 20073397 is about 4480.3344741213. The cubic root of 20073397 is about 271.7734064772.

The spelling of 20073397 in words is "twenty million, seventy-three thousand, three hundred ninety-seven".