2021132020 has 24 divisors (see below), whose sum is σ = 4302522504. Its totient is φ = 797377536.

The previous prime is 2021131999. The next prime is 2021132041. The reversal of 2021132020 is 202311202.

It is an interprime number because it is at equal distance from previous prime (2021131999) and next prime (2021132041).

It can be written as a sum of positive squares in 4 ways, for example, as 533332836 + 1487799184 = 23094^2 + 38572^2 .

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, 690709 + ... + 693628.

It is an arithmetic number, because the mean of its divisors is an integer number (179271771).

Almost surely, 2^2021132020 is an apocalyptic number.

2021132020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021132020 is an abundant number, since it is smaller than the sum of its proper divisors (2281390484).

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

2021132020 is a wasteful number, since it uses less digits than its factorization.

2021132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384419 (or 1384417 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2021132020 is about 44957.0019018173. The cubic root of 2021132020 is about 1264.3429584316.

Adding to 2021132020 its reverse (202311202), we get a palindrome (2223443222).

The spelling of 2021132020 in words is "two billion, twenty-one million, one hundred thirty-two thousand, twenty".