2011312320 has 56 divisors (see below), whose sum is σ = 6385919664. Its totient is φ = 536349696.

The previous prime is 2011312319. The next prime is 2011312337. The reversal of 2011312320 is 232131102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2011312320.

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, 1046599 + ... + 1048518.

Almost surely, 2^2011312320 is an apocalyptic number.

2011312320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011312320 is an abundant number, since it is smaller than the sum of its proper divisors (4374607344).

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

2011312320 is a wasteful number, since it uses less digits than its factorization.

2011312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095137 (or 2095127 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2011312320 is about 44847.6567949765. The cubic root of 2011312320 is about 1262.2920236440.

Adding to 2011312320 its reverse (232131102), we get a palindrome (2243443422).

The spelling of 2011312320 in words is "two billion, eleven million, three hundred twelve thousand, three hundred twenty".