21022000989 has 16 divisors (see below), whose sum is σ = 31906911744. Its totient is φ = 12186666800.

The previous prime is 21022000903. The next prime is 21022001029. The reversal of 21022000989 is 98900022012.

It is a happy number.

It is not a de Polignac number, because 21022000989 - 2⁷ = 21022000861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022000289) 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, 13847727 + ... + 13849244.

It is an arithmetic number, because the mean of its divisors is an integer number (1994181984).

Almost surely, 2^21022000989 is an apocalyptic number.

It is an amenable number.

21022000989 is a deficient number, since it is larger than the sum of its proper divisors (10884910755).

21022000989 is a wasteful number, since it uses less digits than its factorization.

21022000989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27697008.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 21022000989 in words is "twenty-one billion, twenty-two million, nine hundred eighty-nine", and thus it is an aban number.