2021394180587 has 16 divisors (see below), whose sum is σ = 2120605251072. Its totient is φ = 1924545471840.

The previous prime is 2021394180583. The next prime is 2021394180671. The reversal of 2021394180587 is 7850814931202.

It is a cyclic number.

It is not a de Polignac number, because 2021394180587 - 2² = 2021394180583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021394180583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9147512 + ... + 9365882.

It is an arithmetic number, because the mean of its divisors is an integer number (132537828192).

Almost surely, 2^{2021394180587} is an apocalyptic number.

2021394180587 is a deficient number, since it is larger than the sum of its proper divisors (99211070485).

2021394180587 is a wasteful number, since it uses less digits than its factorization.

2021394180587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223778.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 2021394180587 in words is "two trillion, twenty-one billion, three hundred ninety-four million, one hundred eighty thousand, five hundred eighty-seven".