20672201 has 4 divisors (see below), whose sum is σ = 22551504. Its totient is φ = 18792900.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672201 is 10227602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20672201 - 2¹⁸ = 20410057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20672231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939635 + ... + 939656.

It is an arithmetic number, because the mean of its divisors is an integer number (5637876).

Almost surely, 2^20672201 is an apocalyptic number.

It is an amenable number.

20672201 is a deficient number, since it is larger than the sum of its proper divisors (1879303).

20672201 is a wasteful number, since it uses less digits than its factorization.

20672201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879302.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20672201 is about 4546.6692204294. The cubic root of 20672201 is about 274.4493709455.

Adding to 20672201 its reverse (10227602), we get a palindrome (30899803).

The spelling of 20672201 in words is "twenty million, six hundred seventy-two thousand, two hundred one".