20243505534 has 48 divisors (see below), whose sum is σ = 47299429008. Its totient is φ = 5759015808.

The previous prime is 20243505533. The next prime is 20243505539. The reversal of 20243505534 is 43550534202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20243505495 and 20243505504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243505533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79257 + ... + 216260.

It is an arithmetic number, because the mean of its divisors is an integer number (985404771).

Almost surely, 2^20243505534 is an apocalyptic number.

20243505534 is an abundant number, since it is smaller than the sum of its proper divisors (27055923474).

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

20243505534 is a wasteful number, since it uses less digits than its factorization.

20243505534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295769 (or 295762 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 33.

The spelling of 20243505534 in words is "twenty billion, two hundred forty-three million, five hundred five thousand, five hundred thirty-four".