20612797 has 2 divisors, whose sum is σ = 20612798. Its totient is φ = 20612796.

The previous prime is 20612747. The next prime is 20612803. The reversal of 20612797 is 79721602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 488601 = 4486^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 20612797 - 2²³ = 12224189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20612717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306398 + 10306399.

It is an arithmetic number, because the mean of its divisors is an integer number (10306399).

Almost surely, 2^20612797 is an apocalyptic number.

It is an amenable number.

20612797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612797 is an equidigital number, since it uses as much as digits as its factorization.

20612797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 20612797 is about 4540.1318262799. The cubic root of 20612797 is about 274.1862312185.

The spelling of 20612797 in words is "twenty million, six hundred twelve thousand, seven hundred ninety-seven".