20430032021 has 24 divisors (see below), whose sum is σ = 24566215680. Its totient is φ = 16923060000.

The previous prime is 20430031991. The next prime is 20430032113. The reversal of 20430032021 is 12023003402.

It is not a de Polignac number, because 20430032021 - 2¹⁴ = 20430015637 is a prime.

It is a super-3 number, since 3×20430032021³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430032921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1131815 + ... + 1149723.

It is an arithmetic number, because the mean of its divisors is an integer number (1023592320).

Almost surely, 2^20430032021 is an apocalyptic number.

It is an amenable number.

20430032021 is a deficient number, since it is larger than the sum of its proper divisors (4136183659).

20430032021 is a wasteful number, since it uses less digits than its factorization.

20430032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18705 (or 18698 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20430032021 its reverse (12023003402), we get a palindrome (32453035423).

The spelling of 20430032021 in words is "twenty billion, four hundred thirty million, thirty-two thousand, twenty-one".