20667080 has 64 divisors (see below), whose sum is σ = 54881280. Its totient is φ = 6854400.

The previous prime is 20667067. The next prime is 20667107. The reversal of 20667080 is 8076602.

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 15 ways as a sum of consecutive naturals, for example, 7490 + ... + 9870.

It is an arithmetic number, because the mean of its divisors is an integer number (857520).

Almost surely, 2^20667080 is an apocalyptic number.

20667080 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 20667080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27440640).

20667080 is an abundant number, since it is smaller than the sum of its proper divisors (34214200).

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

20667080 is a wasteful number, since it uses less digits than its factorization.

20667080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20667080 is about 4546.1060260403. The cubic root of 20667080 is about 274.4267065100.

The spelling of 20667080 in words is "twenty million, six hundred sixty-seven thousand, eighty".