20675797 has 2 divisors, whose sum is σ = 20675798. Its totient is φ = 20675796.

The previous prime is 20675789. The next prime is 20675813. The reversal of 20675797 is 79757602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17023876 + 3651921 = 4126^2 + 1911^2 .

It is a cyclic number.

It is not a de Polignac number, because 20675797 - 2³ = 20675789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20675737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337898 + 10337899.

It is an arithmetic number, because the mean of its divisors is an integer number (10337899).

Almost surely, 2^20675797 is an apocalyptic number.

It is an amenable number.

20675797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20675797 is an equidigital number, since it uses as much as digits as its factorization.

20675797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 185220, while the sum is 43.

The square root of 20675797 is about 4547.0646575566. The cubic root of 20675797 is about 274.4652838248.

The spelling of 20675797 in words is "twenty million, six hundred seventy-five thousand, seven hundred ninety-seven".