20472361 has 16 divisors (see below), whose sum is σ = 25306624. Its totient is φ = 16127424.

The previous prime is 20472349. The next prime is 20472377. The reversal of 20472361 is 16327402.

It is a cyclic number.

It is not a de Polignac number, because 20472361 - 2¹⁹ = 19948073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20472341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33091 + ... + 33703.

It is an arithmetic number, because the mean of its divisors is an integer number (1581664).

Almost surely, 2^20472361 is an apocalyptic number.

It is an amenable number.

20472361 is a deficient number, since it is larger than the sum of its proper divisors (4834263).

20472361 is a wasteful number, since it uses less digits than its factorization.

20472361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20472361 is about 4524.6393226422. The cubic root of 20472361 is about 273.5621302946.

Adding to 20472361 its reverse (16327402), we get a palindrome (36799763).

The spelling of 20472361 in words is "twenty million, four hundred seventy-two thousand, three hundred sixty-one".