20521301024 has 48 divisors (see below), whose sum is σ = 46691769600. Its totient is φ = 8696016384.

The previous prime is 20521301023. The next prime is 20521301093. The reversal of 20521301024 is 42010312502.

It is a super-4 number, since 4×20521301024⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20521300987 and 20521301005.

It is not an unprimeable number, because it can be changed into a prime (20521301023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494744 + ... + 534615.

It is an arithmetic number, because the mean of its divisors is an integer number (972745200).

Almost surely, 2^20521301024 is an apocalyptic number.

It is an amenable number.

20521301024 is an abundant number, since it is smaller than the sum of its proper divisors (26170468576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20521301024 is a wasteful number, since it uses less digits than its factorization.

20521301024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029465 (or 1029457 counting only the distinct ones).

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

Adding to 20521301024 its reverse (42010312502), we get a palindrome (62531613526).

The spelling of 20521301024 in words is "twenty billion, five hundred twenty-one million, three hundred one thousand, twenty-four".