20157204131434 has 16 divisors (see below), whose sum is σ = 30299972000040. Its totient is φ = 10057219692480.

The previous prime is 20157204131359. The next prime is 20157204131443. The reversal of 20157204131434 is 43413140275102.

It can be written as a sum of positive squares in 4 ways, for example, as 18689236841025 + 1467967290409 = 4323105^2 + 1211597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20157204131393 and 20157204131402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4934224 + ... + 8041204.

Almost surely, 2^{20157204131434} is an apocalyptic number.

20157204131434 is a deficient number, since it is larger than the sum of its proper divisors (10142767868606).

20157204131434 is a wasteful number, since it uses less digits than its factorization.

20157204131434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113865.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 20157204131434 in words is "twenty trillion, one hundred fifty-seven billion, two hundred four million, one hundred thirty-one thousand, four hundred thirty-four".