27473421007 has 4 divisors (see below), whose sum is σ = 27474386760. Its totient is φ = 27472455256.

The previous prime is 27473420993. The next prime is 27473421037. The reversal of 27473421007 is 70012437472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27473421007 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 (27473421037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438868 + ... + 497545.

It is an arithmetic number, because the mean of its divisors is an integer number (6868596690).

Almost surely, 2^27473421007 is an apocalyptic number.

27473421007 is a deficient number, since it is larger than the sum of its proper divisors (965753).

27473421007 is an equidigital number, since it uses as much as digits as its factorization.

27473421007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965752.

The product of its (nonzero) digits is 65856, while the sum is 37.

Adding to 27473421007 its reverse (70012437472), we get a palindrome (97485858479).

The spelling of 27473421007 in words is "twenty-seven billion, four hundred seventy-three million, four hundred twenty-one thousand, seven".