27100020 has 24 divisors (see below), whose sum is σ = 75880224. Its totient is φ = 7226656.

The previous prime is 27099991. The next prime is 27100033. The reversal of 27100020 is 2000172.

It is a super-2 number, since 2×27100020² = 1468822168000800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 27099969 and 27100005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225774 + ... + 225893.

It is an arithmetic number, because the mean of its divisors is an integer number (3161676).

Almost surely, 2^27100020 is an apocalyptic number.

27100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27100020 is an abundant number, since it is smaller than the sum of its proper divisors (48780204).

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

27100020 is a wasteful number, since it uses less digits than its factorization.

27100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451679 (or 451677 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 27100020 is about 5205.7679548747. The cubic root of 27100020 is about 300.3699879532.

Adding to 27100020 its reverse (2000172), we get a palindrome (29100192).

The spelling of 27100020 in words is "twenty-seven million, one hundred thousand, twenty".