20397069 has 32 divisors (see below), whose sum is σ = 37678080. Its totient is φ = 10594800.

The previous prime is 20397031. The next prime is 20397073. The reversal of 20397069 is 96079302.

It is not a de Polignac number, because 20397069 - 2⁷ = 20396941 is a prime.

It is a super-2 number, since 2×20397069² = 832080847581522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20397019) 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 in 31 ways as a sum of consecutive naturals, for example, 2827 + ... + 6984.

It is an arithmetic number, because the mean of its divisors is an integer number (1177440).

Almost surely, 2^20397069 is an apocalyptic number.

It is an amenable number.

20397069 is a deficient number, since it is larger than the sum of its proper divisors (17281011).

20397069 is a wasteful number, since it uses less digits than its factorization.

20397069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838 (or 9832 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 20397069 is about 4516.3114374454. The cubic root of 20397069 is about 273.2263549565.

The spelling of 20397069 in words is "twenty million, three hundred ninety-seven thousand, sixty-nine".