2311323420 has 192 divisors, whose sum is σ = 7687766016. Its totient is φ = 507720960.

The previous prime is 2311323409. The next prime is 2311323431. The reversal of 2311323420 is 243231132.

It is an interprime number because it is at equal distance from previous prime (2311323409) and next prime (2311323431).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2173809 + ... + 2174871.

It is an arithmetic number, because the mean of its divisors is an integer number (40040448).

Almost surely, 2^2311323420 is an apocalyptic number.

2311323420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311323420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3843883008).

2311323420 is an abundant number, since it is smaller than the sum of its proper divisors (5376442596).

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

2311323420 is a wasteful number, since it uses less digits than its factorization.

2311323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2311323420 is about 48076.2251013950. The cubic root of 2311323420 is about 1322.1688060660.

Adding to 2311323420 its reverse (243231132), we get a palindrome (2554554552).

The spelling of 2311323420 in words is "two billion, three hundred eleven million, three hundred twenty-three thousand, four hundred twenty".