13111323420 has 96 divisors (see below), whose sum is σ = 41254682112. Its totient is φ = 3087076608.

The previous prime is 13111323403. The next prime is 13111323437. The reversal of 13111323420 is 2432311131.

It is an interprime number because it is at equal distance from previous prime (13111323403) and next prime (13111323437).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347482 + ... + 383361.

It is an arithmetic number, because the mean of its divisors is an integer number (429736272).

Almost surely, 2^13111323420 is an apocalyptic number.

13111323420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111323420 is an abundant number, since it is smaller than the sum of its proper divisors (28143358692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13111323420 is a wasteful number, since it uses less digits than its factorization.

13111323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730891 (or 730889 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13111323420 its reverse (2432311131), we get a palindrome (15543634551).

The spelling of 13111323420 in words is "thirteen billion, one hundred eleven million, three hundred twenty-three thousand, four hundred twenty".