32010021 has 6 divisors (see below), whose sum is σ = 46236710. Its totient is φ = 21340008.

The previous prime is 32010019. The next prime is 32010047. The reversal of 32010021 is 12001023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 6305121 = 5070^2 + 2511^2 .

It is not a de Polignac number, because 32010021 - 2¹ = 32010019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 3556669 = 32010021 / (3 + 2 + 0 + 1 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32009985 and 32010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32010001) 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, 1778326 + ... + 1778343.

Almost surely, 2^32010021 is an apocalyptic number.

It is an amenable number.

32010021 is a deficient number, since it is larger than the sum of its proper divisors (14226689).

32010021 is a wasteful number, since it uses less digits than its factorization.

32010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556675 (or 3556672 counting only the distinct ones).

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

The square root of 32010021 is about 5657.7399197913. The cubic root of 32010021 is about 317.5133472389.

Adding to 32010021 its reverse (12001023), we get a palindrome (44011044).

The spelling of 32010021 in words is "thirty-two million, ten thousand, twenty-one".