20105132434 has 16 divisors (see below), whose sum is σ = 30293784576. Its totient is φ = 10007272800.

The previous prime is 20105132431. The next prime is 20105132449. The reversal of 20105132434 is 43423150102.

It is a junction number, because it is equal to n+sod(n) for n = 20105132399 and 20105132408.

It is not an unprimeable number, because it can be changed into a prime (20105132431) 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, 594439 + ... + 627349.

It is an arithmetic number, because the mean of its divisors is an integer number (1893361536).

Almost surely, 2^20105132434 is an apocalyptic number.

20105132434 is a deficient number, since it is larger than the sum of its proper divisors (10188652142).

20105132434 is a wasteful number, since it uses less digits than its factorization.

20105132434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34281.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20105132434 its reverse (43423150102), we get a palindrome (63528282536).

The spelling of 20105132434 in words is "twenty billion, one hundred five million, one hundred thirty-two thousand, four hundred thirty-four".