20523030450 has 72 divisors (see below), whose sum is σ = 55113512688. Its totient is φ = 5051816640.

The previous prime is 20523030449. The next prime is 20523030487. The reversal of 20523030450 is 5403032502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523030450.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 379444 + ... + 430143.

It is an arithmetic number, because the mean of its divisors is an integer number (765465454).

Almost surely, 2^20523030450 is an apocalyptic number.

20523030450 is an abundant number, since it is smaller than the sum of its proper divisors (34590482238).

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

20523030450 is a wasteful number, since it uses less digits than its factorization.

20523030450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809628 (or 809610 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20523030450 its reverse (5403032502), we get a palindrome (25926062952).

The spelling of 20523030450 in words is "twenty billion, five hundred twenty-three million, thirty thousand, four hundred fifty".