21010433065 has 16 divisors (see below), whose sum is σ = 25645973760. Its totient is φ = 16519513600.

The previous prime is 21010433029. The next prime is 21010433099. The reversal of 21010433065 is 56033401012.

It is not a de Polignac number, because 21010433065 - 2¹³ = 21010424873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2195040 + ... + 2204590.

It is an arithmetic number, because the mean of its divisors is an integer number (1602873360).

Almost surely, 2^21010433065 is an apocalyptic number.

It is an amenable number.

21010433065 is a deficient number, since it is larger than the sum of its proper divisors (4635540695).

21010433065 is an equidigital number, since it uses as much as digits as its factorization.

21010433065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17072.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21010433065 its reverse (56033401012), we get a palindrome (77043834077).

The spelling of 21010433065 in words is "twenty-one billion, ten million, four hundred thirty-three thousand, sixty-five".