20672628 has 12 divisors (see below), whose sum is σ = 48236160. Its totient is φ = 6890872.

The previous prime is 20672609. The next prime is 20672633. The reversal of 20672628 is 82627602.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 861348 + ... + 861371.

It is an arithmetic number, because the mean of its divisors is an integer number (4019680).

Almost surely, 2^20672628 is an apocalyptic number.

It is an amenable number.

20672628 is an abundant number, since it is smaller than the sum of its proper divisors (27563532).

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

20672628 is a wasteful number, since it uses less digits than its factorization.

20672628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722726 (or 1722724 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 20672628 is about 4546.7161776385. The cubic root of 20672628 is about 274.4512605858.

The spelling of 20672628 in words is "twenty million, six hundred seventy-two thousand, six hundred twenty-eight".