20672140 has 24 divisors (see below), whose sum is σ = 44009280. Its totient is φ = 8155008.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672140 is 4127602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5620 + ... + 8539.

It is an arithmetic number, because the mean of its divisors is an integer number (1833720).

Almost surely, 2^20672140 is an apocalyptic number.

20672140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20672140 is an abundant number, since it is smaller than the sum of its proper divisors (23337140).

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

20672140 is a wasteful number, since it uses less digits than its factorization.

20672140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14241 (or 14239 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20672140 is about 4546.6625122171. The cubic root of 20672140 is about 274.4491009947.

Adding to 20672140 its reverse (4127602), we get a palindrome (24799742).

The spelling of 20672140 in words is "twenty million, six hundred seventy-two thousand, one hundred forty".