27157473021 has 32 divisors (see below), whose sum is σ = 44039635200. Its totient is φ = 14531521536.

The previous prime is 27157473011. The next prime is 27157473029. The reversal of 27157473021 is 12037475172.

It is not a de Polignac number, because 27157473021 - 2⁵ = 27157472989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27157473029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122746 + ... + 263403.

It is an arithmetic number, because the mean of its divisors is an integer number (1376238600).

Almost surely, 2^27157473021 is an apocalyptic number.

27157473021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27157473021 is a deficient number, since it is larger than the sum of its proper divisors (16882162179).

27157473021 is a wasteful number, since it uses less digits than its factorization.

27157473021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386373.

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 27157473021 in words is "twenty-seven billion, one hundred fifty-seven million, four hundred seventy-three thousand, twenty-one".