23521021004 has 48 divisors (see below), whose sum is σ = 44624387808. Its totient is φ = 10783523328.

The previous prime is 23521020961. The next prime is 23521021087. The reversal of 23521021004 is 40012012532.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5656094 + ... + 5660250.

It is an arithmetic number, because the mean of its divisors is an integer number (929674746).

Almost surely, 2^23521021004 is an apocalyptic number.

It is an amenable number.

23521021004 is a deficient number, since it is larger than the sum of its proper divisors (21103366804).

23521021004 is a wasteful number, since it uses less digits than its factorization.

23521021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874 (or 4872 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 23521021004 its reverse (40012012532), we get a palindrome (63533033536).

The spelling of 23521021004 in words is "twenty-three billion, five hundred twenty-one million, twenty-one thousand, four".