21426054464 has 14 divisors (see below), whose sum is σ = 42517326954. Its totient is φ = 10713027200.

The previous prime is 21426054451. The next prime is 21426054469. The reversal of 21426054464 is 46445062412.

It can be written as a sum of positive squares in only one way, i.e., 21421249600 + 4804864 = 146360^2 + 2192^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426054469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167390987 + ... + 167391114.

Almost surely, 2^21426054464 is an apocalyptic number.

It is an amenable number.

21426054464 is a deficient number, since it is larger than the sum of its proper divisors (21091272490).

21426054464 is an equidigital number, since it uses as much as digits as its factorization.

21426054464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334782113 (or 334782103 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 21426054464 in words is "twenty-one billion, four hundred twenty-six million, fifty-four thousand, four hundred sixty-four".