20020421432 has 32 divisors (see below), whose sum is σ = 40957732080. Its totient is φ = 9098664960.

The previous prime is 20020421363. The next prime is 20020421479. The reversal of 20020421432 is 23412402002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635198 + ... + 665970.

Almost surely, 2^20020421432 is an apocalyptic number.

20020421432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20020421432 is an abundant number, since it is smaller than the sum of its proper divisors (20937310648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20020421432 is a wasteful number, since it uses less digits than its factorization.

20020421432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38183 (or 38179 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20020421432 its reverse (23412402002), we get a palindrome (43432823434).

The spelling of 20020421432 in words is "twenty billion, twenty million, four hundred twenty-one thousand, four hundred thirty-two".