20432163534 has 16 divisors (see below), whose sum is σ = 41176270080. Its totient is φ = 6758730680.

The previous prime is 20432163529. The next prime is 20432163539. The reversal of 20432163534 is 43536123402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20432163529) and next prime (20432163539).

It is a junction number, because it is equal to n+sod(n) for n = 20432163495 and 20432163504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432163539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12996774 + ... + 12998345.

It is an arithmetic number, because the mean of its divisors is an integer number (2573516880).

Almost surely, 2^20432163534 is an apocalyptic number.

20432163534 is an abundant number, since it is smaller than the sum of its proper divisors (20744106546).

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

20432163534 is a wasteful number, since it uses less digits than its factorization.

20432163534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25995255.

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 20432163534 its reverse (43536123402), we get a palindrome (63968286936).

The spelling of 20432163534 in words is "twenty billion, four hundred thirty-two million, one hundred sixty-three thousand, five hundred thirty-four".