20058640 has 160 divisors (see below), whose sum is σ = 58924800. Its totient is φ = 6322176.

The previous prime is 20058637. The next prime is 20058641. The reversal of 20058640 is 4685002.

20058640 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (20058641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466459 + ... + 466501.

It is an arithmetic number, because the mean of its divisors is an integer number (368280).

Almost surely, 2^20058640 is an apocalyptic number.

20058640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20058640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29462400).

20058640 is an abundant number, since it is smaller than the sum of its proper divisors (38866160).

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

20058640 is a wasteful number, since it uses less digits than its factorization.

20058640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20058640 is about 4478.6873076829. The cubic root of 20058640 is about 271.7067918869.

The spelling of 20058640 in words is "twenty million, fifty-eight thousand, six hundred forty".