20197513 has 16 divisors (see below), whose sum is σ = 25729920. Its totient is φ = 15434496.

The previous prime is 20197511. The next prime is 20197531. The reversal of 20197513 is 31579102.

It is not a de Polignac number, because 20197513 - 2¹ = 20197511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20197511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2206 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (1608120).

Almost surely, 2^20197513 is an apocalyptic number.

It is an amenable number.

20197513 is a deficient number, since it is larger than the sum of its proper divisors (5532407).

20197513 is a wasteful number, since it uses less digits than its factorization.

20197513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 20197513 is about 4494.1643272137. The cubic root of 20197513 is about 272.3323908260.

The spelling of 20197513 in words is "twenty million, one hundred ninety-seven thousand, five hundred thirteen".