20686002 has 16 divisors (see below), whose sum is σ = 41532480. Its totient is φ = 6868592.

The previous prime is 20685983. The next prime is 20686009. The reversal of 20686002 is 20068602.

It is not an unprimeable number, because it can be changed into a prime (20686009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4977 + ... + 8132.

It is an arithmetic number, because the mean of its divisors is an integer number (2595780).

Almost surely, 2^20686002 is an apocalyptic number.

20686002 is an abundant number, since it is smaller than the sum of its proper divisors (20846478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20686002 is a wasteful number, since it uses less digits than its factorization.

20686002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13377.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20686002 is about 4548.1866716308. The cubic root of 20686002 is about 274.5104325483.

It can be divided in two parts, 2068600 and 2, that added together give a palindrome (2068602).

The spelling of 20686002 in words is "twenty million, six hundred eighty-six thousand, two".