20051431406 has 8 divisors (see below), whose sum is σ = 30130008480. Its totient is φ = 10008095248.

The previous prime is 20051431399. The next prime is 20051431427. The reversal of 20051431406 is 60413415002.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8808806 + ... + 8811081.

It is an arithmetic number, because the mean of its divisors is an integer number (3766251060).

Almost surely, 2^20051431406 is an apocalyptic number.

20051431406 is a deficient number, since it is larger than the sum of its proper divisors (10078577074).

20051431406 is a wasteful number, since it uses less digits than its factorization.

20051431406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17620458.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20051431406 its reverse (60413415002), we get a palindrome (80464846408).

The spelling of 20051431406 in words is "twenty billion, fifty-one million, four hundred thirty-one thousand, four hundred six".