2020005540 has 144 divisors (see below), whose sum is σ = 7262166912. Its totient is φ = 461707776.

The previous prime is 2020005511. The next prime is 2020005551. The reversal of 2020005540 is 455000202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4332 + ... + 63708.

Almost surely, 2^2020005540 is an apocalyptic number.

2020005540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2020005540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3631083456).

2020005540 is an abundant number, since it is smaller than the sum of its proper divisors (5242161372).

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

2020005540 is a wasteful number, since it uses less digits than its factorization.

2020005540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59408 (or 59394 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2020005540 is about 44944.4717401373. The cubic root of 2020005540 is about 1264.1080204979.

Adding to 2020005540 its reverse (455000202), we get a palindrome (2475005742).

The spelling of 2020005540 in words is "two billion, twenty million, five thousand, five hundred forty".