21348445007 has 2 divisors, whose sum is σ = 21348445008. Its totient is φ = 21348445006.

The previous prime is 21348444989. The next prime is 21348445031. The reversal of 21348445007 is 70054484312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21348445007 - 2¹⁰ = 21348443983 is a prime.

It is a super-2 number, since 2×21348445007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21348445067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10674222503 + 10674222504.

It is an arithmetic number, because the mean of its divisors is an integer number (10674222504).

Almost surely, 2^21348445007 is an apocalyptic number.

21348445007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21348445007 is an equidigital number, since it uses as much as digits as its factorization.

21348445007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 21348445007 in words is "twenty-one billion, three hundred forty-eight million, four hundred forty-five thousand, seven".