27700036021 has 16 divisors (see below), whose sum is σ = 31797333504. Its totient is φ = 23637993984.

The previous prime is 27700035983. The next prime is 27700036033. The reversal of 27700036021 is 12063000772.

It is a cyclic number.

It is not a de Polignac number, because 27700036021 - 2¹⁷ = 27699904949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27700033021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604980 + ... + 1622146.

It is an arithmetic number, because the mean of its divisors is an integer number (1987333344).

Almost surely, 2^27700036021 is an apocalyptic number.

It is an amenable number.

27700036021 is a deficient number, since it is larger than the sum of its proper divisors (4097297483).

27700036021 is a wasteful number, since it uses less digits than its factorization.

27700036021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its (nonzero) digits is 3528, while the sum is 28.

Adding to 27700036021 its reverse (12063000772), we get a palindrome (39763036793).

The spelling of 27700036021 in words is "twenty-seven billion, seven hundred million, thirty-six thousand, twenty-one".