20431213402 has 16 divisors (see below), whose sum is σ = 31054743720. Its totient is φ = 10080258048.

The previous prime is 20431213367. The next prime is 20431213417.

20431213402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 12638031561 + 7793181841 = 112419^2 + 88279^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90877 + ... + 221632.

Almost surely, 2^20431213402 is an apocalyptic number.

20431213402 is a deficient number, since it is larger than the sum of its proper divisors (10623530318).

20431213402 is a wasteful number, since it uses less digits than its factorization.

20431213402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312945.

The product of its (nonzero) digits is 1152, while the sum is 22.

The spelling of 20431213402 in words is "twenty billion, four hundred thirty-one million, two hundred thirteen thousand, four hundred two".