27954038421 has 24 divisors (see below), whose sum is σ = 41110130880. Its totient is φ = 18300240000.

The previous prime is 27954038267. The next prime is 27954038447. The reversal of 27954038421 is 12483045972.

27954038421 is a `hidden beast` number, since 2 + 7 + 9 + 540 + 3 + 84 + 21 = 666.

It is not a de Polignac number, because 27954038421 - 2¹⁹ = 27953514133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27954038491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73245 + ... + 247533.

It is an arithmetic number, because the mean of its divisors is an integer number (1712922120).

Almost surely, 2^27954038421 is an apocalyptic number.

It is an amenable number.

27954038421 is a deficient number, since it is larger than the sum of its proper divisors (13156092459).

27954038421 is a wasteful number, since it uses less digits than its factorization.

27954038421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174617 (or 174614 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 27954038421 in words is "twenty-seven billion, nine hundred fifty-four million, thirty-eight thousand, four hundred twenty-one".