2021270136 has 64 divisors (see below), whose sum is σ = 5206645920. Its totient is φ = 653598720.

The previous prime is 2021270129. The next prime is 2021270143. The reversal of 2021270136 is 6310721202.

It is an interprime number because it is at equal distance from previous prime (2021270129) and next prime (2021270143).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97416 + ... + 116328.

Almost surely, 2^2021270136 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 2021270136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603322960).

2021270136 is an abundant number, since it is smaller than the sum of its proper divisors (3185375784).

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

2021270136 is a wasteful number, since it uses less digits than its factorization.

2021270136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056 (or 19052 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 2021270136 is about 44958.5379655522. The cubic root of 2021270136 is about 1264.3717578061.

Adding to 2021270136 its reverse (6310721202), we get a palindrome (8331991338).

The spelling of 2021270136 in words is "two billion, twenty-one million, two hundred seventy thousand, one hundred thirty-six".