20689060 has 24 divisors (see below), whose sum is σ = 49654080. Its totient is φ = 7093344.

The previous prime is 20689049. The next prime is 20689061. The reversal of 20689060 is 6098602.

It is not an unprimeable number, because it can be changed into a prime (20689061) 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, 73750 + ... + 74029.

It is an arithmetic number, because the mean of its divisors is an integer number (2068920).

Almost surely, 2^20689060 is an apocalyptic number.

20689060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20689060 is an abundant number, since it is smaller than the sum of its proper divisors (28965020).

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

20689060 is a wasteful number, since it uses less digits than its factorization.

20689060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147795 (or 147793 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20689060 is about 4548.5228371417. The cubic root of 20689060 is about 274.5239587892.

The spelling of 20689060 in words is "twenty million, six hundred eighty-nine thousand, sixty".