20432147 has 8 divisors (see below), whose sum is σ = 21681936. Its totient is φ = 19187712.

The previous prime is 20432143. The next prime is 20432149. The reversal of 20432147 is 74123402.

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 20432147 - 2² = 20432143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20432143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8768 + ... + 10850.

It is an arithmetic number, because the mean of its divisors is an integer number (2710242).

Almost surely, 2^20432147 is an apocalyptic number.

20432147 is a deficient number, since it is larger than the sum of its proper divisors (1249789).

20432147 is a wasteful number, since it uses less digits than its factorization.

20432147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20432147 is about 4520.1932480813. The cubic root of 20432147 is about 273.3828928907.

Adding to 20432147 its reverse (74123402), we get a palindrome (94555549).

The spelling of 20432147 in words is "twenty million, four hundred thirty-two thousand, one hundred forty-seven".