20670960 has 80 divisors (see below), whose sum is σ = 65602944. Its totient is φ = 5381376.

The previous prime is 20670959. The next prime is 20670983. The reversal of 20670960 is 6907602.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9319 + ... + 11321.

Almost surely, 2^20670960 is an apocalyptic number.

20670960 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 20670960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32801472).

20670960 is an abundant number, since it is smaller than the sum of its proper divisors (44931984).

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

20670960 is a wasteful number, since it uses less digits than its factorization.

20670960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2056 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20670960 is about 4546.5327448507. The cubic root of 20670960 is about 274.4438788922.

The spelling of 20670960 in words is "twenty million, six hundred seventy thousand, nine hundred sixty".