27371891920 has 40 divisors (see below), whose sum is σ = 65191843080. Its totient is φ = 10681712640.

The previous prime is 27371891893. The next prime is 27371891933. The reversal of 27371891920 is 2919817372.

It can be written as a sum of positive squares in 4 ways, for example, as 1178411584 + 26193480336 = 34328^2 + 161844^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×27371891920² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4169265 + ... + 4175824.

It is an arithmetic number, because the mean of its divisors is an integer number (1629796077).

Almost surely, 2^27371891920 is an apocalyptic number.

27371891920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27371891920 is an abundant number, since it is smaller than the sum of its proper divisors (37819951160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27371891920 is a wasteful number, since it uses less digits than its factorization.

27371891920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345143 (or 8345137 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 27371891920 in words is "twenty-seven billion, three hundred seventy-one million, eight hundred ninety-one thousand, nine hundred twenty".