20431331434 has 16 divisors (see below), whose sum is σ = 32170981248. Its totient is φ = 9712990672.

The previous prime is 20431331429. The next prime is 20431331447. The reversal of 20431331434 is 43413313402.

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, 1322137 + ... + 1337500.

It is an arithmetic number, because the mean of its divisors is an integer number (2010686328).

Almost surely, 2^20431331434 is an apocalyptic number.

20431331434 is a deficient number, since it is larger than the sum of its proper divisors (11739649814).

20431331434 is a wasteful number, since it uses less digits than its factorization.

20431331434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659829.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 20431331434 its reverse (43413313402), we get a palindrome (63844644836).

The spelling of 20431331434 in words is "twenty billion, four hundred thirty-one million, three hundred thirty-one thousand, four hundred thirty-four".