20438380563 has 8 divisors (see below), whose sum is σ = 27403416000. Its totient is φ = 13549466088.

The previous prime is 20438380549. The next prime is 20438380583. The reversal of 20438380563 is 36508383402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20438380563 - 2⁶ = 20438380499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20438380583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19029613 + ... + 19030686.

It is an arithmetic number, because the mean of its divisors is an integer number (3425427000).

Almost surely, 2^20438380563 is an apocalyptic number.

20438380563 is a deficient number, since it is larger than the sum of its proper divisors (6965035437).

20438380563 is a wasteful number, since it uses less digits than its factorization.

20438380563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38060481.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 20438380563 in words is "twenty billion, four hundred thirty-eight million, three hundred eighty thousand, five hundred sixty-three".