20112513 has 8 divisors (see below), whose sum is σ = 28394208. Its totient is φ = 12619584.

The previous prime is 20112503. The next prime is 20112517. The reversal of 20112513 is 31521102.

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

It is not a de Polignac number, because 20112513 - 2¹⁰ = 20111489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112492 and 20112501.

It is not an unprimeable number, because it can be changed into a prime (20112517) 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, 197131 + ... + 197232.

It is an arithmetic number, because the mean of its divisors is an integer number (3549276).

Almost surely, 2^20112513 is an apocalyptic number.

It is an amenable number.

20112513 is a deficient number, since it is larger than the sum of its proper divisors (8281695).

20112513 is a wasteful number, since it uses less digits than its factorization.

20112513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394383.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 20112513 is about 4484.6976486715. The cubic root of 20112513 is about 271.9498222390.

Adding to 20112513 its reverse (31521102), we get a palindrome (51633615).

The spelling of 20112513 in words is "twenty million, one hundred twelve thousand, five hundred thirteen".