20349513 has 24 divisors (see below), whose sum is σ = 31480800. Its totient is φ = 12628224.

The previous prime is 20349491. The next prime is 20349557. The reversal of 20349513 is 31594302.

It is not a de Polignac number, because 20349513 - 2⁵ = 20349481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9081 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (1311700).

Almost surely, 2^20349513 is an apocalyptic number.

It is an amenable number.

20349513 is a deficient number, since it is larger than the sum of its proper divisors (11131287).

20349513 is a wasteful number, since it uses less digits than its factorization.

20349513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20349513 is about 4511.0434491368. The cubic root of 20349513 is about 273.0138462566.

The spelling of 20349513 in words is "twenty million, three hundred forty-nine thousand, five hundred thirteen".