20667416 has 48 divisors (see below), whose sum is σ = 49186440. Its totient is φ = 8050560.

The previous prime is 20667397. The next prime is 20667433. The reversal of 20667416 is 61476602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1916 + ... + 6708.

Almost surely, 2^20667416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20667416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24593220).

20667416 is an abundant number, since it is smaller than the sum of its proper divisors (28519024).

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

20667416 is a wasteful number, since it uses less digits than its factorization.

20667416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4813 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20667416 is about 4546.1429805935. The cubic root of 20667416 is about 274.4281936878.

The spelling of 20667416 in words is "twenty million, six hundred sixty-seven thousand, four hundred sixteen".