27102636420 has 96 divisors (see below), whose sum is σ = 76963461120. Its totient is φ = 7125565440.

The previous prime is 27102636389. The next prime is 27102636437. The reversal of 27102636420 is 2463620172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1284516 + ... + 1305444.

It is an arithmetic number, because the mean of its divisors is an integer number (801702720).

Almost surely, 2^27102636420 is an apocalyptic number.

27102636420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27102636420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38481730560).

27102636420 is an abundant number, since it is smaller than the sum of its proper divisors (49860824700).

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

27102636420 is a wasteful number, since it uses less digits than its factorization.

27102636420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21245 (or 21243 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 27102636420 in words is "twenty-seven billion, one hundred two million, six hundred thirty-six thousand, four hundred twenty".