21034553341 has 2 divisors, whose sum is σ = 21034553342. Its totient is φ = 21034553340.

The previous prime is 21034553311. The next prime is 21034553347. The reversal of 21034553341 is 14335543012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18644810116 + 2389743225 = 136546^2 + 48885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21034553341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21034553347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517276670 + 10517276671.

It is an arithmetic number, because the mean of its divisors is an integer number (10517276671).

Almost surely, 2^21034553341 is an apocalyptic number.

It is an amenable number.

21034553341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034553341 is an equidigital number, since it uses as much as digits as its factorization.

21034553341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 21034553341 in words is "twenty-one billion, thirty-four million, five hundred fifty-three thousand, three hundred forty-one".