20990160798 has 8 divisors (see below), whose sum is σ = 41980321608. Its totient is φ = 6996720264.

The previous prime is 20990160769. The next prime is 20990160799. The reversal of 20990160798 is 89706109902.

It is a happy number.

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

20990160798 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20990160798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20990160799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1749180061 + ... + 1749180072.

It is an arithmetic number, because the mean of its divisors is an integer number (5247540201).

Almost surely, 2^20990160798 is an apocalyptic number.

20990160798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20990160798 is a wasteful number, since it uses less digits than its factorization.

20990160798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498360138.

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 20990160798 in words is "twenty billion, nine hundred ninety million, one hundred sixty thousand, seven hundred ninety-eight".