20032429 has 4 divisors (see below), whose sum is σ = 20573884. Its totient is φ = 19490976.

The previous prime is 20032423. The next prime is 20032457. The reversal of 20032429 is 92423002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18507204 + 1525225 = 4302^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032429 - 2¹⁹ = 19508141 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 (20032423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270672 + ... + 270745.

It is an arithmetic number, because the mean of its divisors is an integer number (5143471).

Almost surely, 2^20032429 is an apocalyptic number.

It is an amenable number.

20032429 is a deficient number, since it is larger than the sum of its proper divisors (541455).

20032429 is an equidigital number, since it uses as much as digits as its factorization.

20032429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541454.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20032429 is about 4475.7601589004. The cubic root of 20032429 is about 271.5883921848.

The spelling of 20032429 in words is "twenty million, thirty-two thousand, four hundred twenty-nine".