20613080 has 32 divisors (see below), whose sum is σ = 46556640. Its totient is φ = 8213760.

The previous prime is 20613079. The next prime is 20613097. The reversal of 20613080 is 8031602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 11612 + ... + 13268.

It is an arithmetic number, because the mean of its divisors is an integer number (1454895).

Almost surely, 2^20613080 is an apocalyptic number.

20613080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20613080 is an abundant number, since it is smaller than the sum of its proper divisors (25943560).

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

20613080 is a wasteful number, since it uses less digits than its factorization.

20613080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20613080 is about 4540.1629926689. The cubic root of 20613080 is about 274.1874860110.

Adding to 20613080 its reverse (8031602), we get a palindrome (28644682).

The spelling of 20613080 in words is "twenty million, six hundred thirteen thousand, eighty".