27434777021 has 8 divisors (see below), whose sum is σ = 29052840960. Its totient is φ = 25817185728.

The previous prime is 27434777003. The next prime is 27434777047. The reversal of 27434777021 is 12077743472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27434777021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27434777621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5030 + ... + 234296.

It is an arithmetic number, because the mean of its divisors is an integer number (3631605120).

Almost surely, 2^27434777021 is an apocalyptic number.

It is an amenable number.

27434777021 is a deficient number, since it is larger than the sum of its proper divisors (1618063939).

27434777021 is a wasteful number, since it uses less digits than its factorization.

27434777021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236323.

The product of its (nonzero) digits is 460992, while the sum is 44.

The spelling of 27434777021 in words is "twenty-seven billion, four hundred thirty-four million, seven hundred seventy-seven thousand, twenty-one".