2021939892 has 72 divisors (see below), whose sum is σ = 5852351232. Its totient is φ = 576590400.

The previous prime is 2021939879. The next prime is 2021939923. The reversal of 2021939892 is 2989391202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128917 + ... + 143747.

It is an arithmetic number, because the mean of its divisors is an integer number (81282656).

Almost surely, 2^2021939892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021939892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2926175616).

2021939892 is an abundant number, since it is smaller than the sum of its proper divisors (3830411340).

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

2021939892 is a wasteful number, since it uses less digits than its factorization.

2021939892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15389 (or 15384 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 2021939892 is about 44965.9859449340. The cubic root of 2021939892 is about 1264.5113939423.

The spelling of 2021939892 in words is "two billion, twenty-one million, nine hundred thirty-nine thousand, eight hundred ninety-two".