20435129 has 8 divisors (see below), whose sum is σ = 24007872. Its totient is φ = 17148240.

The previous prime is 20435119. The next prime is 20435131. The reversal of 20435129 is 92153402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20435129 - 2⁸ = 20434873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20435098 and 20435107.

It is not an unprimeable number, because it can be changed into a prime (20435119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71309 + ... + 71594.

It is an arithmetic number, because the mean of its divisors is an integer number (3000984).

Almost surely, 2^20435129 is an apocalyptic number.

It is an amenable number.

20435129 is a deficient number, since it is larger than the sum of its proper divisors (3572743).

20435129 is a wasteful number, since it uses less digits than its factorization.

20435129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142927.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20435129 is about 4520.5230892011. The cubic root of 20435129 is about 273.3961920010.

The spelling of 20435129 in words is "twenty million, four hundred thirty-five thousand, one hundred twenty-nine".