27220187004 has 12 divisors (see below), whose sum is σ = 63513769704. Its totient is φ = 9073395664.

The previous prime is 27220186963. The next prime is 27220187009. The reversal of 27220187004 is 40078102272.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27220187009) 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, 1134174447 + ... + 1134174470.

It is an arithmetic number, because the mean of its divisors is an integer number (5292814142).

Almost surely, 2^27220187004 is an apocalyptic number.

It is an amenable number.

27220187004 is an abundant number, since it is smaller than the sum of its proper divisors (36293582700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27220187004 is a wasteful number, since it uses less digits than its factorization.

27220187004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268348924 (or 2268348922 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

Adding to 27220187004 its reverse (40078102272), we get a palindrome (67298289276).

The spelling of 27220187004 in words is "twenty-seven billion, two hundred twenty million, one hundred eighty-seven thousand, four".