20199429 has 32 divisors (see below), whose sum is σ = 31207680. Its totient is φ = 12902400.

The previous prime is 20199427. The next prime is 20199437. The reversal of 20199429 is 92499102.

It is not a de Polignac number, because 20199429 - 2¹ = 20199427 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20199393 and 20199402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78469 + ... + 78725.

It is an arithmetic number, because the mean of its divisors is an integer number (975240).

Almost surely, 2^20199429 is an apocalyptic number.

It is an amenable number.

20199429 is a deficient number, since it is larger than the sum of its proper divisors (11008251).

20199429 is a wasteful number, since it uses less digits than its factorization.

20199429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 20199429 is about 4494.3774874837. The cubic root of 20199429 is about 272.3410019912.

The spelling of 20199429 in words is "twenty million, one hundred ninety-nine thousand, four hundred twenty-nine".