21446463351 has 16 divisors (see below), whose sum is σ = 31138243200. Its totient is φ = 13078060128.

The previous prime is 21446463349. The next prime is 21446463377. The reversal of 21446463351 is 15336464412.

It is not a de Polignac number, because 21446463351 - 2¹ = 21446463349 is a prime.

It is a super-2 number, since 2×21446463351² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446463751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6485481 + ... + 6488786.

It is an arithmetic number, because the mean of its divisors is an integer number (1946140200).

Almost surely, 2^21446463351 is an apocalyptic number.

21446463351 is a deficient number, since it is larger than the sum of its proper divisors (9691779849).

21446463351 is a wasteful number, since it uses less digits than its factorization.

21446463351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974318.

The product of its digits is 207360, while the sum is 39.

The spelling of 21446463351 in words is "twenty-one billion, four hundred forty-six million, four hundred sixty-three thousand, three hundred fifty-one".