20431424102 has 4 divisors (see below), whose sum is σ = 30647136156. Its totient is φ = 10215712050.

The previous prime is 20431424099. The next prime is 20431424131. The reversal of 20431424102 is 20142413402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5107856024 + ... + 5107856027.

It is an arithmetic number, because the mean of its divisors is an integer number (7661784039).

Almost surely, 2^20431424102 is an apocalyptic number.

20431424102 is a deficient number, since it is larger than the sum of its proper divisors (10215712054).

20431424102 is a wasteful number, since it uses less digits than its factorization.

20431424102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215712053.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20431424102 its reverse (20142413402), we get a palindrome (40573837504).

The spelling of 20431424102 in words is "twenty billion, four hundred thirty-one million, four hundred twenty-four thousand, one hundred two".