20990846148 has 24 divisors (see below), whose sum is σ = 48981424128. Its totient is φ = 6996551136.

The previous prime is 20990846143. The next prime is 20990846189. The reversal of 20990846148 is 84164809902.

It is a self number, because there is not a number n which added to its sum of digits gives 20990846148.

It is not an unprimeable number, because it can be changed into a prime (20990846143) 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, 235965 + ... + 312507.

It is an arithmetic number, because the mean of its divisors is an integer number (2040892672).

Almost surely, 2^20990846148 is an apocalyptic number.

It is an amenable number.

20990846148 is an abundant number, since it is smaller than the sum of its proper divisors (27990577980).

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

20990846148 is a wasteful number, since it uses less digits than its factorization.

20990846148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99403 (or 99401 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 20990846148 in words is "twenty billion, nine hundred ninety million, eight hundred forty-six thousand, one hundred forty-eight".