32640020 has 24 divisors (see below), whose sum is σ = 78336384. Its totient is φ = 11190816.

The previous prime is 32640011. The next prime is 32640071. The reversal of 32640020 is 2004623.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116432 + ... + 116711.

It is an arithmetic number, because the mean of its divisors is an integer number (3264016).

Almost surely, 2^32640020 is an apocalyptic number.

It is an amenable number.

32640020 is an abundant number, since it is smaller than the sum of its proper divisors (45696364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32640020 is a wasteful number, since it uses less digits than its factorization.

32640020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233159 (or 233157 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 32640020 is about 5713.1444931841. The cubic root of 32640020 is about 319.5828548924.

Adding to 32640020 its reverse (2004623), we get a palindrome (34644643).

The spelling of 32640020 in words is "thirty-two million, six hundred forty thousand, twenty".