27100073421 has 16 divisors (see below), whose sum is σ = 40155409920. Its totient is φ = 18063496800.

The previous prime is 27100073411. The next prime is 27100073453. The reversal of 27100073421 is 12437000172.

It is a happy number.

It is not a de Polignac number, because 27100073421 - 2⁵ = 27100073389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27100073401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70116 + ... + 243138.

It is an arithmetic number, because the mean of its divisors is an integer number (2509713120).

Almost surely, 2^27100073421 is an apocalyptic number.

It is an amenable number.

27100073421 is a deficient number, since it is larger than the sum of its proper divisors (13055336499).

27100073421 is a wasteful number, since it uses less digits than its factorization.

27100073421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178833 (or 178827 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

Adding to 27100073421 its reverse (12437000172), we get a palindrome (39537073593).

The spelling of 27100073421 in words is "twenty-seven billion, one hundred million, seventy-three thousand, four hundred twenty-one".