2021328075240 has 96 divisors (see below), whose sum is σ = 6746865376680. Its totient is φ = 524452686336.

The previous prime is 2021328075197. The next prime is 2021328075241. The reversal of 2021328075240 is 425708231202.

2021328075240 is a `hidden beast` number, since 2 + 0 + 21 + 32 + 80 + 7 + 524 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1446530587524 + 574797487716 = 1202718^2 + 758154^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2021328075195 and 2021328075204.

It is not an unprimeable number, because it can be changed into a prime (2021328075241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75862359 + ... + 75888998.

Almost surely, 2^{2021328075240} is an apocalyptic number.

2021328075240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021328075240 is an abundant number, since it is smaller than the sum of its proper divisors (4725537301440).

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

2021328075240 is a wasteful number, since it uses less digits than its factorization.

2021328075240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151751411 (or 151751404 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 2021328075240 in words is "two trillion, twenty-one billion, three hundred twenty-eight million, seventy-five thousand, two hundred forty".