2021440536 has 160 divisors (see below), whose sum is σ = 5917626000. Its totient is φ = 644039424.

The previous prime is 2021440523. The next prime is 2021440543. The reversal of 2021440536 is 6350441202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1413870 + ... + 1415298.

Almost surely, 2^2021440536 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 2021440536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2958813000).

2021440536 is an abundant number, since it is smaller than the sum of its proper divisors (3896185464).

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

2021440536 is a wasteful number, since it uses less digits than its factorization.

2021440536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2021440536 is about 44960.4330050323. The cubic root of 2021440536 is about 1264.4072870986.

Adding to 2021440536 its reverse (6350441202), we get a palindrome (8371881738).

The spelling of 2021440536 in words is "two billion, twenty-one million, four hundred forty thousand, five hundred thirty-six".