20990846149 has 48 divisors (see below), whose sum is σ = 26942301568. Its totient is φ = 15924190464.

The previous prime is 20990846143. The next prime is 20990846189. The reversal of 20990846149 is 94164809902.

It is not a de Polignac number, because 20990846149 - 2⁵ = 20990846117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20990846096 and 20990846105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20990846143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12014494 + ... + 12016240.

Almost surely, 2^20990846149 is an apocalyptic number.

20990846149 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20990846149 is a deficient number, since it is larger than the sum of its proper divisors (5951455419).

20990846149 is a wasteful number, since it uses less digits than its factorization.

20990846149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 20990846149 in words is "twenty billion, nine hundred ninety million, eight hundred forty-six thousand, one hundred forty-nine".