21653051446603 has 2 divisors, whose sum is σ = 21653051446604. Its totient is φ = 21653051446602.

The previous prime is 21653051446583. The next prime is 21653051446661. The reversal of 21653051446603 is 30664415035612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21653051446603 - 2¹⁷ = 21653051315531 is a prime.

It is not a weakly prime, because it can be changed into another prime (21653051446003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826525723301 + 10826525723302.

It is an arithmetic number, because the mean of its divisors is an integer number (10826525723302).

Almost surely, 2^{21653051446603} is an apocalyptic number.

21653051446603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21653051446603 is an equidigital number, since it uses as much as digits as its factorization.

21653051446603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 21653051446603 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-one million, four hundred forty-six thousand, six hundred three".