1021345633 has 24 divisors (see below), whose sum is σ = 1295824320. Its totient is φ = 787908000.

The previous prime is 1021345603. The next prime is 1021345639. The reversal of 1021345633 is 3365431201.

It is a de Polignac number, because none of the positive numbers 2^k-1021345633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021345639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79578 + ... + 91516.

It is an arithmetic number, because the mean of its divisors is an integer number (53992680).

Almost surely, 2^1021345633 is an apocalyptic number.

It is an amenable number.

1021345633 is a deficient number, since it is larger than the sum of its proper divisors (274478687).

1021345633 is a wasteful number, since it uses less digits than its factorization.

1021345633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12069 (or 12058 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1021345633 is about 31958.4986036578. The cubic root of 1021345633 is about 1007.0651767211.

Adding to 1021345633 its reverse (3365431201), we get a palindrome (4386776834).

The spelling of 1021345633 in words is "one billion, twenty-one million, three hundred forty-five thousand, six hundred thirty-three".