21442023402451 has 2 divisors, whose sum is σ = 21442023402452. Its totient is φ = 21442023402450.

The previous prime is 21442023402389. The next prime is 21442023402493. The reversal of 21442023402451 is 15420432024412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21442023402451 - 2¹¹ = 21442023400403 is a prime.

It is not a weakly prime, because it can be changed into another prime (21442026402451) 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, 10721011701225 + 10721011701226.

It is an arithmetic number, because the mean of its divisors is an integer number (10721011701226).

Almost surely, 2^{21442023402451} is an apocalyptic number.

21442023402451 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442023402451 is an equidigital number, since it uses as much as digits as its factorization.

21442023402451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 21442023402451 its reverse (15420432024412), we get a palindrome (36862455426863).

The spelling of 21442023402451 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, four hundred fifty-one".