20097231 has 48 divisors (see below), whose sum is σ = 35405568. Its totient is φ = 9849600.

The previous prime is 20097223. The next prime is 20097241. The reversal of 20097231 is 13279002.

It is not a de Polignac number, because 20097231 - 2³ = 20097223 is a prime.

It is a super-2 number, since 2×20097231² = 807797387734722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20097221) 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 47 ways as a sum of consecutive naturals, for example, 83271 + ... + 83511.

It is an arithmetic number, because the mean of its divisors is an integer number (737616).

Almost surely, 2^20097231 is an apocalyptic number.

20097231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20097231 is a deficient number, since it is larger than the sum of its proper divisors (15308337).

20097231 is a wasteful number, since it uses less digits than its factorization.

20097231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20097231 is about 4482.9935311129. The cubic root of 20097231 is about 271.8809266511.

The spelling of 20097231 in words is "twenty million, ninety-seven thousand, two hundred thirty-one".