20432271 has 8 divisors (see below), whose sum is σ = 27350064. Its totient is φ = 13568000.

The previous prime is 20432261. The next prime is 20432273. The reversal of 20432271 is 17223402.

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 20432271 - 2⁷ = 20432143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432273) 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, 12480 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (3418758).

Almost surely, 2^20432271 is an apocalyptic number.

20432271 is a deficient number, since it is larger than the sum of its proper divisors (6917793).

20432271 is a wasteful number, since it uses less digits than its factorization.

20432271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26761.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20432271 is about 4520.2069642883. The cubic root of 20432271 is about 273.3834459312.

Adding to 20432271 its reverse (17223402), we get a palindrome (37655673).

The spelling of 20432271 in words is "twenty million, four hundred thirty-two thousand, two hundred seventy-one".