2021345142 has 16 divisors (see below), whose sum is σ = 4173100032. Its totient is φ = 652046760.

The previous prime is 2021345099. The next prime is 2021345143. The reversal of 2021345142 is 2415431202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021345143) by changing a digit.

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, 5433538 + ... + 5433909.

It is an arithmetic number, because the mean of its divisors is an integer number (260818752).

Almost surely, 2^2021345142 is an apocalyptic number.

2021345142 is an abundant number, since it is smaller than the sum of its proper divisors (2151754890).

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

2021345142 is a wasteful number, since it uses less digits than its factorization.

2021345142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10867483.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2021345142 is about 44959.3721263987. The cubic root of 2021345142 is about 1264.3873971960.

Adding to 2021345142 its reverse (2415431202), we get a palindrome (4436776344).

The spelling of 2021345142 in words is "two billion, twenty-one million, three hundred forty-five thousand, one hundred forty-two".