20018713 has 8 divisors (see below), whose sum is σ = 23518656. Its totient is φ = 16798800.

The previous prime is 20018659. The next prime is 20018743. The reversal of 20018713 is 31781002.

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 20018713 - 2¹⁷ = 19887641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20018743) 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, 69853 + ... + 70138.

It is an arithmetic number, because the mean of its divisors is an integer number (2939832).

Almost surely, 2^20018713 is an apocalyptic number.

It is an amenable number.

20018713 is a deficient number, since it is larger than the sum of its proper divisors (3499943).

20018713 is a wasteful number, since it uses less digits than its factorization.

20018713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140015.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 20018713 is about 4474.2276428452. The cubic root of 20018713 is about 271.5263934312.

Adding to 20018713 its reverse (31781002), we get a palindrome (51799715).

The spelling of 20018713 in words is "twenty million, eighteen thousand, seven hundred thirteen".