20131311433 has 32 divisors (see below), whose sum is σ = 22284288000. Its totient is φ = 18113621760.

The previous prime is 20131311391. The next prime is 20131311461. The reversal of 20131311433 is 33411313102.

It is a cyclic number.

It is not a de Polignac number, because 20131311433 - 2⁹ = 20131310921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131311133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8327841 + ... + 8330257.

It is an arithmetic number, because the mean of its divisors is an integer number (696384000).

Almost surely, 2^20131311433 is an apocalyptic number.

It is an amenable number.

20131311433 is a deficient number, since it is larger than the sum of its proper divisors (2152976567).

20131311433 is a wasteful number, since it uses less digits than its factorization.

20131311433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20131311433 its reverse (33411313102), we get a palindrome (53542624535).

The spelling of 20131311433 in words is "twenty billion, one hundred thirty-one million, three hundred eleven thousand, four hundred thirty-three".