20799429 has 16 divisors (see below), whose sum is σ = 33073152. Its totient is φ = 11368368.

The previous prime is 20799407. The next prime is 20799431. The reversal of 20799429 is 92499702.

It is not a de Polignac number, because 20799429 - 2⁵ = 20799397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21049 + ... + 22014.

It is an arithmetic number, because the mean of its divisors is an integer number (2067072).

Almost surely, 2^20799429 is an apocalyptic number.

It is an amenable number.

20799429 is a deficient number, since it is larger than the sum of its proper divisors (12273723).

20799429 is a wasteful number, since it uses less digits than its factorization.

20799429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43096.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 20799429 is about 4560.6390999508. The cubic root of 20799429 is about 275.0112568395.

The spelling of 20799429 in words is "twenty million, seven hundred ninety-nine thousand, four hundred twenty-nine".