20573116387 has 4 divisors (see below), whose sum is σ = 20573438920. Its totient is φ = 20572793856.

The previous prime is 20573116373. The next prime is 20573116393. The reversal of 20573116387 is 78361137502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20573116387 - 2²⁷ = 20438898659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20573116397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29937 + ... + 205042.

It is an arithmetic number, because the mean of its divisors is an integer number (5143359730).

Almost surely, 2^20573116387 is an apocalyptic number.

20573116387 is a deficient number, since it is larger than the sum of its proper divisors (322533).

20573116387 is an equidigital number, since it uses as much as digits as its factorization.

20573116387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322532.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 20573116387 in words is "twenty billion, five hundred seventy-three million, one hundred sixteen thousand, three hundred eighty-seven".