20097513 has 6 divisors (see below), whose sum is σ = 29029754. Its totient is φ = 13398336.

The previous prime is 20097509. The next prime is 20097563. The reversal of 20097513 is 31579002.

It can be written as a sum of positive squares in only one way, i.e., 14953689 + 5143824 = 3867^2 + 2268^2 .

It is not a de Polignac number, because 20097513 - 2² = 20097509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20097563) 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 5 ways as a sum of consecutive naturals, for example, 1116520 + ... + 1116537.

Almost surely, 2^20097513 is an apocalyptic number.

It is an amenable number.

20097513 is a deficient number, since it is larger than the sum of its proper divisors (8932241).

20097513 is a wasteful number, since it uses less digits than its factorization.

20097513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233063 (or 2233060 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20097513 is about 4483.0249832005. The cubic root of 20097513 is about 271.8821983033.

The spelling of 20097513 in words is "twenty million, ninety-seven thousand, five hundred thirteen".