20673789975 has 72 divisors (see below), whose sum is σ = 38832983280. Its totient is φ = 10901848320.

The previous prime is 20673789931. The next prime is 20673789979. The reversal of 20673789975 is 57998737602.

It is not a de Polignac number, because 20673789975 - 2¹⁶ = 20673724439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673789979) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 521557 + ... + 559793.

It is an arithmetic number, because the mean of its divisors is an integer number (539346990).

Almost surely, 2^20673789975 is an apocalyptic number.

20673789975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20673789975 is a deficient number, since it is larger than the sum of its proper divisors (18159193305).

20673789975 is an equidigital number, since it uses as much as digits as its factorization.

20673789975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38351 (or 38334 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 20673789975 in words is "twenty billion, six hundred seventy-three million, seven hundred eighty-nine thousand, nine hundred seventy-five".