21442023400403 has 2 divisors, whose sum is σ = 21442023400404. Its totient is φ = 21442023400402.

The previous prime is 21442023400387. The next prime is 21442023400463. The reversal of 21442023400403 is 30400432024412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21442023400403 - 2⁴ = 21442023400387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21442023400463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721011700201 + 10721011700202.

It is an arithmetic number, because the mean of its divisors is an integer number (10721011700202).

Almost surely, 2^{21442023400403} is an apocalyptic number.

21442023400403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442023400403 is an equidigital number, since it uses as much as digits as its factorization.

21442023400403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21442023400403 its reverse (30400432024412), we get a palindrome (51842455424815).

The spelling of 21442023400403 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred thousand, four hundred three".