20544644502 has 12 divisors (see below), whose sum is σ = 44513396460. Its totient is φ = 6848214828.

The previous prime is 20544644473. The next prime is 20544644513.

20544644502 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 4 + 644 + 5 + 0 + 2 = 666.

20544644502 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570684552 + ... + 570684587.

It is an arithmetic number, because the mean of its divisors is an integer number (3709449705).

Almost surely, 2^20544644502 is an apocalyptic number.

20544644502 is an abundant number, since it is smaller than the sum of its proper divisors (23968751958).

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

20544644502 is a wasteful number, since it uses less digits than its factorization.

20544644502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141369147 (or 1141369144 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

The spelling of 20544644502 in words is "twenty billion, five hundred forty-four million, six hundred forty-four thousand, five hundred two".