20432441421 has 24 divisors (see below), whose sum is σ = 34156711680. Its totient is φ = 11527884576.

The previous prime is 20432441417. The next prime is 20432441431. The reversal of 20432441421 is 12414423402.

20432441421 is a `hidden beast` number, since 204 + 3 + 24 + 414 + 21 = 666.

It is not a de Polignac number, because 20432441421 - 2² = 20432441417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432441401) 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, 2047710 + ... + 2057663.

It is an arithmetic number, because the mean of its divisors is an integer number (1423196320).

Almost surely, 2^20432441421 is an apocalyptic number.

20432441421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20432441421 is a deficient number, since it is larger than the sum of its proper divisors (13724270259).

20432441421 is a wasteful number, since it uses less digits than its factorization.

20432441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105465 (or 4105462 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20432441421 its reverse (12414423402), we get a palindrome (32846864823).

The spelling of 20432441421 in words is "twenty billion, four hundred thirty-two million, four hundred forty-one thousand, four hundred twenty-one".