20434643402 has 8 divisors (see below), whose sum is σ = 30955450212. Its totient is φ = 10116160000.

The previous prime is 20434643387. The next prime is 20434643407.

20434643402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 20426412241 + 8231161 = 142921^2 + 2869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20434643407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50580599 + ... + 50581002.

Almost surely, 2^20434643402 is an apocalyptic number.

20434643402 is a deficient number, since it is larger than the sum of its proper divisors (10520806810).

20434643402 is a wasteful number, since it uses less digits than its factorization.

20434643402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101161704.

The product of its (nonzero) digits is 55296, while the sum is 32.

The spelling of 20434643402 in words is "twenty billion, four hundred thirty-four million, six hundred forty-three thousand, four hundred two".