27865542021 has 8 divisors (see below), whose sum is σ = 37482853440. Its totient is φ = 18412629312.

The previous prime is 27865542007. The next prime is 27865542037. The reversal of 27865542021 is 12024556872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27865542021 - 2¹⁸ = 27865279877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27865542091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41099281 + ... + 41099958.

It is an arithmetic number, because the mean of its divisors is an integer number (4685356680).

Almost surely, 2^27865542021 is an apocalyptic number.

It is an amenable number.

27865542021 is a deficient number, since it is larger than the sum of its proper divisors (9617311419).

27865542021 is a wasteful number, since it uses less digits than its factorization.

27865542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82199355.

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 27865542021 in words is "twenty-seven billion, eight hundred sixty-five million, five hundred forty-two thousand, twenty-one".