21045654012 has 24 divisors (see below), whose sum is σ = 49592732112. Its totient is φ = 6945760000.

The previous prime is 21045653989. The next prime is 21045654053.

21045654012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21045654012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8680989 + ... + 8683412.

It is an arithmetic number, because the mean of its divisors is an integer number (2066363838).

Almost surely, 2^21045654012 is an apocalyptic number.

It is an amenable number.

21045654012 is an abundant number, since it is smaller than the sum of its proper divisors (28547078100).

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

21045654012 is a wasteful number, since it uses less digits than its factorization.

21045654012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364509 (or 17364507 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 21045654012 in words is "twenty-one billion, forty-five million, six hundred fifty-four thousand, twelve".