2021540734880 has 48 divisors (see below), whose sum is σ = 4803496352424. Its totient is φ = 803942200320.

The previous prime is 2021540734817. The next prime is 2021540734883. The reversal of 2021540734880 is 884370451202.

It can be written as a sum of positive squares in 4 ways, for example, as 1984120153744 + 37420581136 = 1408588^2 + 193444^2 .

It is a super-2 number, since 2×2021540734880² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021540734883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36488591 + ... + 36543950.

Almost surely, 2^{2021540734880} is an apocalyptic number.

2021540734880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021540734880 is an abundant number, since it is smaller than the sum of its proper divisors (2781955617544).

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

2021540734880 is a wasteful number, since it uses less digits than its factorization.

2021540734880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73032729 (or 73032721 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 2021540734880 in words is "two trillion, twenty-one billion, five hundred forty million, seven hundred thirty-four thousand, eight hundred eighty".