20581914 has 32 divisors (see below), whose sum is σ = 42690240. Its totient is φ = 6611072.

The previous prime is 20581903. The next prime is 20581919. The reversal of 20581914 is 41918502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20581919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18214 + ... + 19310.

It is an arithmetic number, because the mean of its divisors is an integer number (1334070).

Almost surely, 2^20581914 is an apocalyptic number.

20581914 is an abundant number, since it is smaller than the sum of its proper divisors (22108326).

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

20581914 is a wasteful number, since it uses less digits than its factorization.

20581914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 20581914 is about 4536.7294387036. The cubic root of 20581914 is about 274.0492301476.

The spelling of 20581914 in words is "twenty million, five hundred eighty-one thousand, nine hundred fourteen".