2021154808675 has 12 divisors (see below), whose sum is σ = 2507360456656. Its totient is φ = 1616195786400.

The previous prime is 2021154808597. The next prime is 2021154808681. The reversal of 2021154808675 is 5768084511202.

It is not a de Polignac number, because 2021154808675 - 2³⁵ = 1986795070307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 18144879 + ... + 18255928.

Almost surely, 2^{2021154808675} is an apocalyptic number.

2021154808675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2021154808675 is a deficient number, since it is larger than the sum of its proper divisors (486205647981).

2021154808675 is a wasteful number, since it uses less digits than its factorization.

2021154808675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36403038 (or 36403033 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 2021154808675 in words is "two trillion, twenty-one billion, one hundred fifty-four million, eight hundred eight thousand, six hundred seventy-five".