2140545540 has 96 divisors (see below), whose sum is σ = 6899929344. Its totient is φ = 485683200.

The previous prime is 2140545523. The next prime is 2140545541. The reversal of 2140545540 is 455450412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2140545498 and 2140545507.

It is not an unprimeable number, because it can be changed into a prime (2140545541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38940 + ... + 76140.

It is an arithmetic number, because the mean of its divisors is an integer number (71874264).

Almost surely, 2^2140545540 is an apocalyptic number.

2140545540 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 2140545540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3449964672).

2140545540 is an abundant number, since it is smaller than the sum of its proper divisors (4759383804).

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

2140545540 is a wasteful number, since it uses less digits than its factorization.

2140545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37357 (or 37355 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2140545540 is about 46266.0300868791. The cubic root of 2140545540 is about 1288.7682371153.

Adding to 2140545540 its reverse (455450412), we get a palindrome (2595995952).

The spelling of 2140545540 in words is "two billion, one hundred forty million, five hundred forty-five thousand, five hundred forty".