20432004021 has 48 divisors (see below), whose sum is σ = 34893680640. Its totient is φ = 11357573760.

The previous prime is 20432004011. The next prime is 20432004037. The reversal of 20432004021 is 12040023402.

20432004021 is a `hidden beast` number, since 20 + 43 + 200 + 402 + 1 = 666.

It is not a de Polignac number, because 20432004021 - 2²¹ = 20429906869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20432003985 and 20432004003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432004011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151500 + ... + 252618.

It is an arithmetic number, because the mean of its divisors is an integer number (726951680).

Almost surely, 2^20432004021 is an apocalyptic number.

It is an amenable number.

20432004021 is a deficient number, since it is larger than the sum of its proper divisors (14461676619).

20432004021 is a wasteful number, since it uses less digits than its factorization.

20432004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101306 (or 101303 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20432004021 its reverse (12040023402), we get a palindrome (32472027423).

The spelling of 20432004021 in words is "twenty billion, four hundred thirty-two million, four thousand, twenty-one".