20027873691 has 48 divisors (see below), whose sum is σ = 34596357120. Its totient is φ = 10916136000.

The previous prime is 20027873651. The next prime is 20027873699. The reversal of 20027873691 is 19637872002.

20027873691 is a `hidden beast` number, since 200 + 2 + 7 + 87 + 369 + 1 = 666.

It is not a de Polignac number, because 20027873691 - 2¹³ = 20027865499 is a prime.

It is a super-2 number, since 2×20027873691² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20027873699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500941 + ... + 539441.

It is an arithmetic number, because the mean of its divisors is an integer number (720757440).

Almost surely, 2^20027873691 is an apocalyptic number.

20027873691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20027873691 is a deficient number, since it is larger than the sum of its proper divisors (14568483429).

20027873691 is a wasteful number, since it uses less digits than its factorization.

20027873691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38896 (or 38893 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20027873691 in words is "twenty billion, twenty-seven million, eight hundred seventy-three thousand, six hundred ninety-one".