20281713 has 8 divisors (see below), whose sum is σ = 27063168. Its totient is φ = 13510704.

The previous prime is 20281711. The next prime is 20281727. The reversal of 20281713 is 31718202.

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

It is not a de Polignac number, because 20281713 - 2¹ = 20281711 is a prime.

It is a super-2 number, since 2×20281713² = 822695764428738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20281711) 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, 5731 + ... + 8567.

It is an arithmetic number, because the mean of its divisors is an integer number (3382896).

Almost surely, 2^20281713 is an apocalyptic number.

It is an amenable number.

20281713 is a deficient number, since it is larger than the sum of its proper divisors (6781455).

20281713 is a wasteful number, since it uses less digits than its factorization.

20281713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20281713 is about 4503.5222881651. The cubic root of 20281713 is about 272.7103019844.

Adding to 20281713 its reverse (31718202), we get a palindrome (51999915).

It can be divided in two parts, 2028 and 1713, that added together give a triangular number (3741 = T₈₆).

The spelling of 20281713 in words is "twenty million, two hundred eighty-one thousand, seven hundred thirteen".