20597069 has 2 divisors, whose sum is σ = 20597070. Its totient is φ = 20597068.

The previous prime is 20597041. The next prime is 20597089. The reversal of 20597069 is 96079502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 3374569 = 4150^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 20597069 - 2¹² = 20592973 is a prime.

It is a super-2 number, since 2×20597069² = 848478502781522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20597039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10298534 + 10298535.

It is an arithmetic number, because the mean of its divisors is an integer number (10298535).

Almost surely, 2^20597069 is an apocalyptic number.

It is an amenable number.

20597069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20597069 is an equidigital number, since it uses as much as digits as its factorization.

20597069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20597069 is about 4538.3993874493. The cubic root of 20597069 is about 274.1164768433.

The spelling of 20597069 in words is "twenty million, five hundred ninety-seven thousand, sixty-nine".