2115694820 has 24 divisors (see below), whose sum is σ = 4586281728. Its totient is φ = 818978400.

The previous prime is 2115694807. The next prime is 2115694837. The reversal of 2115694820 is 284965112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705586 + ... + 1706825.

It is an arithmetic number, because the mean of its divisors is an integer number (191095072).

Almost surely, 2^2115694820 is an apocalyptic number.

2115694820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115694820 is an abundant number, since it is smaller than the sum of its proper divisors (2470586908).

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

2115694820 is a wasteful number, since it uses less digits than its factorization.

2115694820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412451 (or 3412449 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2115694820 is about 45996.6827064735. The cubic root of 2115694820 is about 1283.7614818514.

The spelling of 2115694820 in words is "two billion, one hundred fifteen million, six hundred ninety-four thousand, eight hundred twenty".