21464446412 has 12 divisors (see below), whose sum is σ = 37565388336. Its totient is φ = 10731478320.

The previous prime is 21464446391. The next prime is 21464446417.

21464446412 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21464446417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118664 + ... + 238767.

It is an arithmetic number, because the mean of its divisors is an integer number (3130449028).

Almost surely, 2^21464446412 is an apocalyptic number.

It is an amenable number.

21464446412 is a deficient number, since it is larger than the sum of its proper divisors (16100941924).

21464446412 is a wasteful number, since it uses less digits than its factorization.

21464446412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372448 (or 372446 counting only the distinct ones).

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

The spelling of 21464446412 in words is "twenty-one billion, four hundred sixty-four million, four hundred forty-six thousand, four hundred twelve".