20732201 has 4 divisors (see below), whose sum is σ = 23693952. Its totient is φ = 17770452.

The previous prime is 20732171. The next prime is 20732221. The reversal of 20732201 is 10223702.

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 de Polignac number, because none of the positive numbers 2^k-20732201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20732201.

It is not an unprimeable number, because it can be changed into a prime (20732221) 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, 1480865 + ... + 1480878.

It is an arithmetic number, because the mean of its divisors is an integer number (5923488).

Almost surely, 2^20732201 is an apocalyptic number.

It is an amenable number.

20732201 is a deficient number, since it is larger than the sum of its proper divisors (2961751).

20732201 is an equidigital number, since it uses as much as digits as its factorization.

20732201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961750.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20732201 is about 4553.2626763674. The cubic root of 20732201 is about 274.7146395283.

Adding to 20732201 its reverse (10223702), we get a palindrome (30955903).

The spelling of 20732201 in words is "twenty million, seven hundred thirty-two thousand, two hundred one".