9000027000021 has 16 divisors (see below), whose sum is σ = 12029432000000. Its totient is φ = 5985335835648.

The previous prime is 9000026999993. The next prime is 9000027000047. The reversal of 9000027000021 is 1200007200009.

It is a happy number.

It is not a de Polignac number, because 9000027000021 - 2⁵ = 9000026999989 is a prime.

It is a super-2 number, since 2×9000027000021² (a number of 27 digits) contains 22 as substring.

It is the 3000005-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000027000121) by changing a digit.

It is a nontrivial repunit in base 3000004.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295905 + ... + 4252953.

It is an arithmetic number, because the mean of its divisors is an integer number (751839500000).

Almost surely, 2^{9000027000021} is an apocalyptic number.

It is an amenable number.

9000027000021 is a deficient number, since it is larger than the sum of its proper divisors (3029404999979).

9000027000021 is a wasteful number, since it uses less digits than its factorization.

9000027000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958908.

The product of its (nonzero) digits is 252, while the sum is 21.

The spelling of 9000027000021 in words is "nine trillion, twenty-seven million, twenty-one", and thus it is an aban number and an uban number.