20432402434 has 4 divisors (see below), whose sum is σ = 30648603654. Its totient is φ = 10216201216.

The previous prime is 20432402401. The next prime is 20432402447. The reversal of 20432402434 is 43420423402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17636636809 + 2795765625 = 132803^2 + 52875^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108100607 + ... + 5108100610.

Almost surely, 2^20432402434 is an apocalyptic number.

20432402434 is a deficient number, since it is larger than the sum of its proper divisors (10216201220).

20432402434 is a wasteful number, since it uses less digits than its factorization.

20432402434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216201219.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20432402434 its reverse (43420423402), we get a palindrome (63852825836).

The spelling of 20432402434 in words is "twenty billion, four hundred thirty-two million, four hundred two thousand, four hundred thirty-four".