21041533345 has 16 divisors (see below), whose sum is σ = 28865865600. Its totient is φ = 14424027264.

The previous prime is 21041533319. The next prime is 21041533349. The reversal of 21041533345 is 54333514012.

It is a cyclic number.

It is not a de Polignac number, because 21041533345 - 2⁷ = 21041533217 is a prime.

It is a super-2 number, since 2×21041533345² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21041533349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24349 + ... + 206581.

It is an arithmetic number, because the mean of its divisors is an integer number (1804116600).

Almost surely, 2^21041533345 is an apocalyptic number.

It is an amenable number.

21041533345 is a deficient number, since it is larger than the sum of its proper divisors (7824332255).

21041533345 is a wasteful number, since it uses less digits than its factorization.

21041533345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185544.

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

The spelling of 21041533345 in words is "twenty-one billion, forty-one million, five hundred thirty-three thousand, three hundred forty-five".