20133580 has 24 divisors (see below), whose sum is σ = 42759360. Its totient is φ = 7962240.

The previous prime is 20133563. The next prime is 20133613. The reversal of 20133580 is 8533102.

It is a super-2 number, since 2×20133580² = 810722087232800, which contains 22 as substring.

It is a plaindrome in base 16.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3876 + ... + 7435.

It is an arithmetic number, because the mean of its divisors is an integer number (1781640).

Almost surely, 2^20133580 is an apocalyptic number.

20133580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133580 is an abundant number, since it is smaller than the sum of its proper divisors (22625780).

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

20133580 is a wasteful number, since it uses less digits than its factorization.

20133580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11409 (or 11407 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20133580 is about 4487.0457987411. The cubic root of 20133580 is about 272.0447410542.

Adding to 20133580 its reverse (8533102), we get a palindrome (28666682).

The spelling of 20133580 in words is "twenty million, one hundred thirty-three thousand, five hundred eighty".