20126402670434 has 4 divisors (see below), whose sum is σ = 30189604005654. Its totient is φ = 10063201335216.

The previous prime is 20126402670397. The next prime is 20126402670443. The reversal of 20126402670434 is 43407620462102.

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., 17854892505025 + 2271510165409 = 4225505^2 + 1507153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20126402670391 and 20126402670400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031600667607 + ... + 5031600667610.

Almost surely, 2^{20126402670434} is an apocalyptic number.

20126402670434 is a deficient number, since it is larger than the sum of its proper divisors (10063201335220).

20126402670434 is a wasteful number, since it uses less digits than its factorization.

20126402670434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063201335219.

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 20126402670434 in words is "twenty trillion, one hundred twenty-six billion, four hundred two million, six hundred seventy thousand, four hundred thirty-four".