20431013402 has 8 divisors (see below), whose sum is σ = 30721451700. Its totient is φ = 10190529504.

The previous prime is 20431013401. The next prime is 20431013429.

20431013402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 16667068201 + 3763945201 = 129101^2 + 61351^2 .

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

It is a super-2 number, since 2×20431013402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20431013401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12487577 + ... + 12489212.

Almost surely, 2^20431013402 is an apocalyptic number.

20431013402 is a deficient number, since it is larger than the sum of its proper divisors (10290438298).

20431013402 is a wasteful number, since it uses less digits than its factorization.

20431013402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24977200.

The product of its (nonzero) digits is 576, while the sum is 20.

It can be divided in two parts, 204310 and 13402, that added together give a palindrome (217712).

The spelling of 20431013402 in words is "twenty billion, four hundred thirty-one million, thirteen thousand, four hundred two".