2021878012 has 24 divisors (see below), whose sum is σ = 4411370880. Its totient is φ = 787744560.

The previous prime is 2021877967. The next prime is 2021878031. The reversal of 2021878012 is 2108781202.

It is a congruent number.

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, 3281962 + ... + 3282577.

It is an arithmetic number, because the mean of its divisors is an integer number (183807120).

Almost surely, 2^2021878012 is an apocalyptic number.

2021878012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2021878012 is an abundant number, since it is smaller than the sum of its proper divisors (2389492868).

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

2021878012 is a wasteful number, since it uses less digits than its factorization.

2021878012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564561 (or 6564559 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 2021878012 is about 44965.2978640195. The cubic root of 2021878012 is about 1264.4984939935.

The spelling of 2021878012 in words is "two billion, twenty-one million, eight hundred seventy-eight thousand, twelve".