27021958938 has 32 divisors (see below), whose sum is σ = 64667937600. Its totient is φ = 8314448688.

The previous prime is 27021958861. The next prime is 27021958961. The reversal of 27021958938 is 83985912072.

27021958938 is a `hidden beast` number, since 2 + 7 + 0 + 21 + 9 + 589 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19245708 + ... + 19247111.

It is an arithmetic number, because the mean of its divisors is an integer number (2020873050).

Almost surely, 2^27021958938 is an apocalyptic number.

27021958938 is an abundant number, since it is smaller than the sum of its proper divisors (37645978662).

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

27021958938 is a wasteful number, since it uses less digits than its factorization.

27021958938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38492843 (or 38492837 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 27021958938 in words is "twenty-seven billion, twenty-one million, nine hundred fifty-eight thousand, nine hundred thirty-eight".