21602041014553 has 2 divisors, whose sum is σ = 21602041014554. Its totient is φ = 21602041014552.

The previous prime is 21602041014461. The next prime is 21602041014641. The reversal of 21602041014553 is 35541014020612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18582884559369 + 3019156455184 = 4310787^2 + 1737572^2 .

It is a cyclic number.

It is not a de Polignac number, because 21602041014553 - 2³³ = 21593451079961 is a prime.

It is not a weakly prime, because it can be changed into another prime (21602011014553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801020507276 + 10801020507277.

It is an arithmetic number, because the mean of its divisors is an integer number (10801020507277).

Almost surely, 2^{21602041014553} is an apocalyptic number.

It is an amenable number.

21602041014553 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602041014553 is an equidigital number, since it uses as much as digits as its factorization.

21602041014553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 21602041014553 in words is "twenty-one trillion, six hundred two billion, forty-one million, fourteen thousand, five hundred fifty-three".