20132001 has 12 divisors (see below), whose sum is σ = 30610320. Its totient is φ = 12714840.

The previous prime is 20131999. The next prime is 20132009. The reversal of 20132001 is 10023102.

It is a happy number.

It is not a de Polignac number, because 20132001 - 2¹ = 20131999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20132009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58695 + ... + 59036.

It is an arithmetic number, because the mean of its divisors is an integer number (2550860).

Almost surely, 2^20132001 is an apocalyptic number.

It is an amenable number.

20132001 is a deficient number, since it is larger than the sum of its proper divisors (10478319).

20132001 is a wasteful number, since it uses less digits than its factorization.

20132001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117756 (or 117753 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20132001 is about 4486.8698443347. The cubic root of 20132001 is about 272.0376290573.

Adding to 20132001 its reverse (10023102), we get a palindrome (30155103).

The spelling of 20132001 in words is "twenty million, one hundred thirty-two thousand, one".