2021141988 has 36 divisors (see below), whose sum is σ = 5134949820. Its totient is φ = 670291776.

The previous prime is 2021141981. The next prime is 2021141989. The reversal of 2021141988 is 8891411202.

It is a happy number.

2021141988 is a `hidden beast` number, since 20 + 211 + 419 + 8 + 8 = 666.

2021141988 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1988446464 + 32695524 = 44592^2 + 5718^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2021141981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135403 + ... + 149586.

It is an arithmetic number, because the mean of its divisors is an integer number (142637495).

Almost surely, 2^2021141988 is an apocalyptic number.

It is an amenable number.

2021141988 is an abundant number, since it is smaller than the sum of its proper divisors (3113807832).

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

2021141988 is a wasteful number, since it uses less digits than its factorization.

2021141988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285196 (or 285191 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 2021141988 is about 44957.1127631657. The cubic root of 2021141988 is about 1264.3450369614.

The spelling of 2021141988 in words is "two billion, twenty-one million, one hundred forty-one thousand, nine hundred eighty-eight".