27405311020 has 48 divisors (see below), whose sum is σ = 60067290528. Its totient is φ = 10492951040.

The previous prime is 27405310993. The next prime is 27405311033. The reversal of 27405311020 is 2011350472.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271834 + ... + 358753.

It is an arithmetic number, because the mean of its divisors is an integer number (1251401886).

Almost surely, 2^27405311020 is an apocalyptic number.

27405311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27405311020 is an abundant number, since it is smaller than the sum of its proper divisors (32661979508).

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

27405311020 is a wasteful number, since it uses less digits than its factorization.

27405311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630690 (or 630688 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 27405311020 its reverse (2011350472), we get a palindrome (29416661492).

The spelling of 27405311020 in words is "twenty-seven billion, four hundred five million, three hundred eleven thousand, twenty".