20131333423 has 2 divisors, whose sum is σ = 20131333424. Its totient is φ = 20131333422.

The previous prime is 20131333357. The next prime is 20131333427. The reversal of 20131333423 is 32433313102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20131333423 - 2¹³ = 20131325231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131333427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065666711 + 10065666712.

It is an arithmetic number, because the mean of its divisors is an integer number (10065666712).

Almost surely, 2^20131333423 is an apocalyptic number.

20131333423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131333423 is an equidigital number, since it uses as much as digits as its factorization.

20131333423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20131333423 its reverse (32433313102), we get a palindrome (52564646525).

The spelling of 20131333423 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-three thousand, four hundred twenty-three".