20682330 has 16 divisors (see below), whose sum is σ = 49637664. Its totient is φ = 5515280.

The previous prime is 20682329. The next prime is 20682367. The reversal of 20682330 is 3328602.

It is a self number, because there is not a number n which added to its sum of digits gives 20682330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344676 + ... + 344735.

It is an arithmetic number, because the mean of its divisors is an integer number (3102354).

Almost surely, 2^20682330 is an apocalyptic number.

20682330 is an abundant number, since it is smaller than the sum of its proper divisors (28955334).

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

20682330 is a wasteful number, since it uses less digits than its factorization.

20682330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689421.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20682330 is about 4547.7829763523. The cubic root of 20682330 is about 274.4941886819.

It can be divided in two parts, 20682 and 330, that added together give a palindrome (21012).

The spelling of 20682330 in words is "twenty million, six hundred eighty-two thousand, three hundred thirty".