20683707 has 16 divisors (see below), whose sum is σ = 30267648. Its totient is φ = 12459680.

The previous prime is 20683681. The next prime is 20683709. The reversal of 20683707 is 70738602.

It is a cyclic number.

It is not a de Polignac number, because 20683707 - 2¹¹ = 20681659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20683709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3898 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (1891728).

Almost surely, 2^20683707 is an apocalyptic number.

20683707 is a deficient number, since it is larger than the sum of its proper divisors (9583941).

20683707 is a wasteful number, since it uses less digits than its factorization.

20683707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20683707 is about 4547.9343662810. The cubic root of 20683707 is about 274.5002803571.

It can be divided in two parts, 2068 and 3707, that added together give a palindrome (5775).

The spelling of 20683707 in words is "twenty million, six hundred eighty-three thousand, seven hundred seven".