20672445 has 8 divisors (see below), whose sum is σ = 33075936. Its totient is φ = 11025296.

The previous prime is 20672441. The next prime is 20672461. The reversal of 20672445 is 54427602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20672445 - 2² = 20672441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689067 + ... + 689096.

It is an arithmetic number, because the mean of its divisors is an integer number (4134492).

Almost surely, 2^20672445 is an apocalyptic number.

It is an amenable number.

20672445 is a deficient number, since it is larger than the sum of its proper divisors (12403491).

20672445 is a wasteful number, since it uses less digits than its factorization.

20672445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378171.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20672445 is about 4546.6960531797. The cubic root of 20672445 is about 274.4504507431.

The spelling of 20672445 in words is "twenty million, six hundred seventy-two thousand, four hundred forty-five".