20386597 has 24 divisors (see below), whose sum is σ = 26183520. Its totient is φ = 15694560.

The previous prime is 20386571. The next prime is 20386631. The reversal of 20386597 is 79568302.

It is not a de Polignac number, because 20386597 - 2¹⁹ = 19862309 is a prime.

It is a super-2 number, since 2×20386597² = 831226674480818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58578 + ... + 58924.

It is an arithmetic number, because the mean of its divisors is an integer number (1090980).

Almost surely, 2^20386597 is an apocalyptic number.

It is an amenable number.

20386597 is a deficient number, since it is larger than the sum of its proper divisors (5796923).

20386597 is a wasteful number, since it uses less digits than its factorization.

20386597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20386597 is about 4515.1519354281. The cubic root of 20386597 is about 273.1795881688.

The spelling of 20386597 in words is "twenty million, three hundred eighty-six thousand, five hundred ninety-seven".