20046513 has 8 divisors (see below), whose sum is σ = 26889408. Its totient is φ = 13283984.

The previous prime is 20046493. The next prime is 20046529. The reversal of 20046513 is 31564002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20046513 - 2¹² = 20042417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20046513.

It is not an unprimeable number, because it can be changed into a prime (20046113) 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, 19506 + ... + 20507.

It is an arithmetic number, because the mean of its divisors is an integer number (3361176).

Almost surely, 2^20046513 is an apocalyptic number.

It is an amenable number.

20046513 is a deficient number, since it is larger than the sum of its proper divisors (6842895).

20046513 is a wasteful number, since it uses less digits than its factorization.

20046513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40183.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20046513 is about 4477.3332464761. Note that the first 3 decimals coincide. The cubic root of 20046513 is about 271.6520249217.

The spelling of 20046513 in words is "twenty million, forty-six thousand, five hundred thirteen".