21446464412 has 6 divisors (see below), whose sum is σ = 37531312728. Its totient is φ = 10723232204.

The previous prime is 21446464411. The next prime is 21446464463.

21446464412 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446464411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680808048 + ... + 2680808055.

It is an arithmetic number, because the mean of its divisors is an integer number (6255218788).

Almost surely, 2^21446464412 is an apocalyptic number.

It is an amenable number.

21446464412 is a deficient number, since it is larger than the sum of its proper divisors (16084848316).

21446464412 is a wasteful number, since it uses less digits than its factorization.

21446464412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361616107 (or 5361616105 counting only the distinct ones).

The product of its digits is 147456, while the sum is 38.

The spelling of 21446464412 in words is "twenty-one billion, four hundred forty-six million, four hundred sixty-four thousand, four hundred twelve".