20434971 has 8 divisors (see below), whose sum is σ = 28431360. Its totient is φ = 13030952.

The previous prime is 20434961. The next prime is 20434979. The reversal of 20434971 is 17943402.

It is a happy number.

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 20434971 - 2¹⁵ = 20402203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148011 + ... + 148148.

It is an arithmetic number, because the mean of its divisors is an integer number (3553920).

Almost surely, 2^20434971 is an apocalyptic number.

20434971 is a deficient number, since it is larger than the sum of its proper divisors (7996389).

20434971 is a wasteful number, since it uses less digits than its factorization.

20434971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296185.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20434971 is about 4520.5056133136. The cubic root of 20434971 is about 273.3954873858.

The spelling of 20434971 in words is "twenty million, four hundred thirty-four thousand, nine hundred seventy-one".