2112729420 has 24 divisors (see below), whose sum is σ = 5915642544. Its totient is φ = 563394496.

The previous prime is 2112729419. The next prime is 2112729481. The reversal of 2112729420 is 249272112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17606019 + ... + 17606138.

It is an arithmetic number, because the mean of its divisors is an integer number (246485106).

Almost surely, 2^2112729420 is an apocalyptic number.

2112729420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112729420 is an abundant number, since it is smaller than the sum of its proper divisors (3802913124).

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

2112729420 is a wasteful number, since it uses less digits than its factorization.

2112729420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35212169 (or 35212167 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2112729420 is about 45964.4364699492. The cubic root of 2112729420 is about 1283.1614195233.

The spelling of 2112729420 in words is "two billion, one hundred twelve million, seven hundred twenty-nine thousand, four hundred twenty".