20622737 has 2 divisors, whose sum is σ = 20622738. Its totient is φ = 20622736.

The previous prime is 20622689. The next prime is 20622773. The reversal of 20622737 is 73722602.

Together with next prime (20622773) 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., 16777216 + 3845521 = 4096^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 20622737 - 2⁶ = 20622673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20622787) 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, 10311368 + 10311369.

It is an arithmetic number, because the mean of its divisors is an integer number (10311369).

Almost surely, 2^20622737 is an apocalyptic number.

It is an amenable number.

20622737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20622737 is an equidigital number, since it uses as much as digits as its factorization.

20622737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20622737 is about 4541.2263762116. The cubic root of 20622737 is about 274.2302972611.

The spelling of 20622737 in words is "twenty million, six hundred twenty-two thousand, seven hundred thirty-seven".