20690982 has 24 divisors (see below), whose sum is σ = 48279504. Its totient is φ = 6366384.

The previous prime is 20690977. The next prime is 20690983. The reversal of 20690982 is 28909602.

It is a super-2 number, since 2×20690982² = 856233472248648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20690983) 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 11 ways as a sum of consecutive naturals, for example, 43978 + ... + 44445.

It is an arithmetic number, because the mean of its divisors is an integer number (2011646).

Almost surely, 2^20690982 is an apocalyptic number.

20690982 is an abundant number, since it is smaller than the sum of its proper divisors (27588522).

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

20690982 is a wasteful number, since it uses less digits than its factorization.

20690982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88444 (or 88441 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20690982 is about 4548.7341096178. The cubic root of 20690982 is about 274.5324595575.

The spelling of 20690982 in words is "twenty million, six hundred ninety thousand, nine hundred eighty-two".