20075429 has 4 divisors (see below), whose sum is σ = 21900480. Its totient is φ = 18250380.

The previous prime is 20075417. The next prime is 20075441. The reversal of 20075429 is 92457002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20075417) and next prime (20075441).

It is a cyclic number.

It is not a de Polignac number, because 20075429 - 2⁴ = 20075413 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 (20075449) 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, 912509 + ... + 912530.

It is an arithmetic number, because the mean of its divisors is an integer number (5475120).

Almost surely, 2^20075429 is an apocalyptic number.

It is an amenable number.

20075429 is a deficient number, since it is larger than the sum of its proper divisors (1825051).

20075429 is a wasteful number, since it uses less digits than its factorization.

20075429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825050.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20075429 is about 4480.5612371666. The cubic root of 20075429 is about 271.7825765731.

The spelling of 20075429 in words is "twenty million, seventy-five thousand, four hundred twenty-nine".