20500447061 has 8 divisors (see below), whose sum is σ = 20952889344. Its totient is φ = 20052552240.

The previous prime is 20500447039. The next prime is 20500447073. The reversal of 20500447061 is 16074400502.

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

It is a cyclic number.

It is not a de Polignac number, because 20500447061 - 2⁶ = 20500446997 is a prime.

It is a super-3 number, since 3×20500447061³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500447021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1127750 + ... + 1145783.

It is an arithmetic number, because the mean of its divisors is an integer number (2619111168).

Almost surely, 2^20500447061 is an apocalyptic number.

It is an amenable number.

20500447061 is a deficient number, since it is larger than the sum of its proper divisors (452442283).

20500447061 is a wasteful number, since it uses less digits than its factorization.

20500447061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273731.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 20500447061 its reverse (16074400502), we get a palindrome (36574847563).

The spelling of 20500447061 in words is "twenty billion, five hundred million, four hundred forty-seven thousand, sixty-one".