20616012647 has 8 divisors (see below), whose sum is σ = 21178236000. Its totient is φ = 20054054304.

The previous prime is 20616012611. The next prime is 20616012667. The reversal of 20616012647 is 74621061602.

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 20616012647 - 2¹⁴ = 20615996263 is a prime.

It is a super-2 number, since 2×20616012647² (a number of 21 digits) contains 22 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 (20616012667) 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, 96854 + ... + 224972.

It is an arithmetic number, because the mean of its divisors is an integer number (2647279500).

Almost surely, 2^20616012647 is an apocalyptic number.

20616012647 is a deficient number, since it is larger than the sum of its proper divisors (562223353).

20616012647 is a wasteful number, since it uses less digits than its factorization.

20616012647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132505.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 20616012647 in words is "twenty billion, six hundred sixteen million, twelve thousand, six hundred forty-seven".