20197369 has 8 divisors (see below), whose sum is σ = 20973960. Its totient is φ = 19426176.

The previous prime is 20197349. The next prime is 20197391. The reversal of 20197369 is 96379102.

It can be written as a sum of positive squares in 4 ways, for example, as 6969600 + 13227769 = 2640^2 + 3637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20197369 - 2¹⁷ = 20066297 is a prime.

It is a super-2 number, since 2×20197369² = 815867429044322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20197319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7309 + ... + 9685.

It is an arithmetic number, because the mean of its divisors is an integer number (2621745).

Almost surely, 2^20197369 is an apocalyptic number.

20197369 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20197369 is a deficient number, since it is larger than the sum of its proper divisors (776591).

20197369 is a wasteful number, since it uses less digits than its factorization.

20197369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 20197369 is about 4494.1483064091. The cubic root of 20197369 is about 272.3317436183.

The spelling of 20197369 in words is "twenty million, one hundred ninety-seven thousand, three hundred sixty-nine".