20494672693 has 8 divisors (see below), whose sum is σ = 22664097216.
Its totient is φ = 18376293600.
The previous prime is 20494672691. The next prime is 20494672703. The reversal of 20494672693 is 39627649402.
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 20494672693 - 21 = 20494672691 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 20494672693.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20494672691) 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, 12760513 + ... + 12762118.
It is an arithmetic number, because the mean of its divisors is an integer number (2833012152).
Almost surely, 220494672693 is an apocalyptic number.
It is an amenable number.
20494672693 is a deficient number, since it is larger than the sum of its proper divisors (2169424523).
20494672693 is a wasteful number, since it uses less digits than its factorization.
20494672693 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25522715.
The product of its (nonzero) digits is 3919104, while the sum is 52.
The spelling of 20494672693 in words is "twenty billion, four hundred ninety-four million, six hundred seventy-two thousand, six hundred ninety-three".