20432420343 has 20 divisors (see below), whose sum is σ = 32317948080. Its totient is φ = 12820341312.

The previous prime is 20432420341. The next prime is 20432420353. The reversal of 20432420343 is 34302423402.

20432420343 is a `hidden beast` number, since 20 + 432 + 4 + 203 + 4 + 3 = 666.

It is not a de Polignac number, because 20432420343 - 2¹ = 20432420341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432420341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7417803 + ... + 7420556.

It is an arithmetic number, because the mean of its divisors is an integer number (1615897404).

Almost surely, 2^20432420343 is an apocalyptic number.

20432420343 is a deficient number, since it is larger than the sum of its proper divisors (11885527737).

20432420343 is a wasteful number, since it uses less digits than its factorization.

20432420343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14838388 (or 14838379 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20432420343 its reverse (34302423402), we get a palindrome (54734843745).

The spelling of 20432420343 in words is "twenty billion, four hundred thirty-two million, four hundred twenty thousand, three hundred forty-three".