2115494920 has 128 divisors (see below), whose sum is σ = 6192599040. Its totient is φ = 630685440.

The previous prime is 2115494911. The next prime is 2115494923. The reversal of 2115494920 is 294945112.

It is a self number, because there is not a number n which added to its sum of digits gives 2115494920.

It is not an unprimeable number, because it can be changed into a prime (2115494923) 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, 55909 + ... + 85771.

It is an arithmetic number, because the mean of its divisors is an integer number (48379680).

Almost surely, 2^2115494920 is an apocalyptic number.

2115494920 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 2115494920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3096299520).

2115494920 is an abundant number, since it is smaller than the sum of its proper divisors (4077104120).

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

2115494920 is a wasteful number, since it uses less digits than its factorization.

2115494920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29915 (or 29911 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2115494920 is about 45994.5096723511. The cubic root of 2115494920 is about 1283.7210487983.

The spelling of 2115494920 in words is "two billion, one hundred fifteen million, four hundred ninety-four thousand, nine hundred twenty".