21446055451 has 2 divisors, whose sum is σ = 21446055452. Its totient is φ = 21446055450.

The previous prime is 21446055427. The next prime is 21446055461. The reversal of 21446055451 is 15455064412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21446055451 - 2¹¹ = 21446053403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21446055451.

It is not a weakly prime, because it can be changed into another prime (21446055461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10723027725 + 10723027726.

It is an arithmetic number, because the mean of its divisors is an integer number (10723027726).

Almost surely, 2^21446055451 is an apocalyptic number.

21446055451 is a deficient number, since it is larger than the sum of its proper divisors (1).

21446055451 is an equidigital number, since it uses as much as digits as its factorization.

21446055451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 21446055451 in words is "twenty-one billion, four hundred forty-six million, fifty-five thousand, four hundred fifty-one".