20028029 has 4 divisors (see below), whose sum is σ = 22889184. Its totient is φ = 17166876.

The previous prime is 20028017. The next prime is 20028031. The reversal of 20028029 is 92082002.

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 a cyclic number.

It is not a de Polignac number, because 20028029 - 2⁴ = 20028013 is a prime.

It is a super-2 number, since 2×20028029² = 802243891249682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20027995 and 20028013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028059) 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, 1430567 + ... + 1430580.

It is an arithmetic number, because the mean of its divisors is an integer number (5722296).

Almost surely, 2^20028029 is an apocalyptic number.

It is an amenable number.

20028029 is a deficient number, since it is larger than the sum of its proper divisors (2861155).

20028029 is an equidigital number, since it uses as much as digits as its factorization.

20028029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861154.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20028029 is about 4475.2685952912. The cubic root of 20028029 is about 271.5685064880.

The spelling of 20028029 in words is "twenty million, twenty-eight thousand, twenty-nine".