432320021 has 8 divisors (see below), whose sum is σ = 494539200. Its totient is φ = 370215648.

The previous prime is 432320011. The next prime is 432320087. The reversal of 432320021 is 120023234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 432320021 - 2²⁶ = 365211157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432320011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20471 + ... + 35828.

It is an arithmetic number, because the mean of its divisors is an integer number (61817400).

Almost surely, 2^432320021 is an apocalyptic number.

It is an amenable number.

432320021 is a deficient number, since it is larger than the sum of its proper divisors (62219179).

432320021 is a wasteful number, since it uses less digits than its factorization.

432320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57403.

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

The square root of 432320021 is about 20792.3067743817. The cubic root of 432320021 is about 756.1392510818.

Adding to 432320021 its reverse (120023234), we get a palindrome (552343255).

The spelling of 432320021 in words is "four hundred thirty-two million, three hundred twenty thousand, twenty-one".