20814513 has 8 divisors (see below), whose sum is σ = 27852576. Its totient is φ = 13826400.

The previous prime is 20814509. The next prime is 20814527. The reversal of 20814513 is 31541802.

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

It is not a de Polignac number, because 20814513 - 2² = 20814509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20814503) 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, 11503 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (3481572).

Almost surely, 2^20814513 is an apocalyptic number.

It is an amenable number.

20814513 is a deficient number, since it is larger than the sum of its proper divisors (7038063).

20814513 is a wasteful number, since it uses less digits than its factorization.

20814513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24975.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20814513 is about 4562.2925158302. The cubic root of 20814513 is about 275.0777212828.

The spelling of 20814513 in words is "twenty million, eight hundred fourteen thousand, five hundred thirteen".