20472201 has 6 divisors (see below), whose sum is σ = 29570970. Its totient is φ = 13648128.

The previous prime is 20472191. The next prime is 20472209. The reversal of 20472201 is 10227402.

20472201 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 5625 = 4524^2 + 75^2 .

It is not a de Polignac number, because 20472201 - 2⁵ = 20472169 is a prime.

It is a super-2 number, since 2×20472201² = 838222027568802, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20472209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137336 + ... + 1137353.

It is an arithmetic number, because the mean of its divisors is an integer number (4928495).

Almost surely, 2^20472201 is an apocalyptic number.

It is an amenable number.

20472201 is a deficient number, since it is larger than the sum of its proper divisors (9098769).

20472201 is a wasteful number, since it uses less digits than its factorization.

20472201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274695 (or 2274692 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20472201 is about 4524.6216416403. The cubic root of 20472201 is about 273.5614176255.

Adding to 20472201 its reverse (10227402), we get a palindrome (30699603).

The spelling of 20472201 in words is "twenty million, four hundred seventy-two thousand, two hundred one".