20124429 has 16 divisors (see below), whose sum is σ = 29249472. Its totient is φ = 12233088.

The previous prime is 20124409. The next prime is 20124437. The reversal of 20124429 is 92442102.

It is not a de Polignac number, because 20124429 - 2⁵ = 20124397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20124399 and 20124408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 6345.

It is an arithmetic number, because the mean of its divisors is an integer number (1828092).

Almost surely, 2^20124429 is an apocalyptic number.

It is an amenable number.

20124429 is a deficient number, since it is larger than the sum of its proper divisors (9125043).

20124429 is a wasteful number, since it uses less digits than its factorization.

20124429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6316.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20124429 is about 4486.0259696083. The cubic root of 20124429 is about 272.0035187333.

It can be divided in two parts, 2012 and 4429, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20124429 in words is "twenty million, one hundred twenty-four thousand, four hundred twenty-nine".