27636894020 has 12 divisors (see below), whose sum is σ = 58037477484. Its totient is φ = 11054757600.

The previous prime is 27636894017. The next prime is 27636894023. The reversal of 27636894020 is 2049863672.

It is an interprime number because it is at equal distance from previous prime (27636894017) and next prime (27636894023).

It can be written as a sum of positive squares in 2 ways, for example, as 13378623556 + 14258270464 = 115666^2 + 119408^2 .

It is a super-2 number, since 2×27636894020² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27636894023) 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, 690922331 + ... + 690922370.

It is an arithmetic number, because the mean of its divisors is an integer number (4836456457).

Almost surely, 2^27636894020 is an apocalyptic number.

27636894020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27636894020 is an abundant number, since it is smaller than the sum of its proper divisors (30400583464).

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

27636894020 is a wasteful number, since it uses less digits than its factorization.

27636894020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381844710 (or 1381844708 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 27636894020 in words is "twenty-seven billion, six hundred thirty-six million, eight hundred ninety-four thousand, twenty".