21996285744007 has 2 divisors, whose sum is σ = 21996285744008. Its totient is φ = 21996285744006.

The previous prime is 21996285743959. The next prime is 21996285744029. The reversal of 21996285744007 is 70044758269912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21996285744007 - 2³⁵ = 21961926005639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21996285744007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21996285742007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10998142872003 + 10998142872004.

It is an arithmetic number, because the mean of its divisors is an integer number (10998142872004).

Almost surely, 2^{21996285744007} is an apocalyptic number.

21996285744007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21996285744007 is an equidigital number, since it uses as much as digits as its factorization.

21996285744007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 21996285744007 in words is "twenty-one trillion, nine hundred ninety-six billion, two hundred eighty-five million, seven hundred forty-four thousand, seven".