20628373 has 2 divisors, whose sum is σ = 20628374. Its totient is φ = 20628372.

The previous prime is 20628337. The next prime is 20628379. The reversal of 20628373 is 37382602.

Together with previous prime (20628337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14085009 + 6543364 = 3753^2 + 2558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20628373 is a prime.

It is a super-3 number, since 3×20628373³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20628379) 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, 10314186 + 10314187.

It is an arithmetic number, because the mean of its divisors is an integer number (10314187).

Almost surely, 2^20628373 is an apocalyptic number.

It is an amenable number.

20628373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20628373 is an equidigital number, since it uses as much as digits as its factorization.

20628373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20628373 is about 4541.8468710427. The cubic root of 20628373 is about 274.2552765057.

The spelling of 20628373 in words is "twenty million, six hundred twenty-eight thousand, three hundred seventy-three".