20235872673 has 24 divisors (see below), whose sum is σ = 30886552320. Its totient is φ = 12740682240.

The previous prime is 20235872659. The next prime is 20235872729. The reversal of 20235872673 is 37627853202.

20235872673 is a `hidden beast` number, since 2 + 0 + 2 + 3 + 587 + 2 + 67 + 3 = 666.

It is not a de Polignac number, because 20235872673 - 2⁹ = 20235872161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20235872603) 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 23 ways as a sum of consecutive naturals, for example, 602368 + ... + 635073.

It is an arithmetic number, because the mean of its divisors is an integer number (1286939680).

Almost surely, 2^20235872673 is an apocalyptic number.

20235872673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20235872673 is a deficient number, since it is larger than the sum of its proper divisors (10650679647).

20235872673 is a wasteful number, since it uses less digits than its factorization.

20235872673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237549 (or 1237546 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 20235872673 in words is "twenty billion, two hundred thirty-five million, eight hundred seventy-two thousand, six hundred seventy-three".