20990223683 has 48 divisors (see below), whose sum is σ = 26087960640. Its totient is φ = 16843432320.

The previous prime is 20990223673. The next prime is 20990223713. The reversal of 20990223683 is 38632209902.

It is a de Polignac number, because none of the positive numbers 2^k-20990223683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20990223613) 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, 6112535 + ... + 6115967.

It is an arithmetic number, because the mean of its divisors is an integer number (543499180).

Almost surely, 2^20990223683 is an apocalyptic number.

20990223683 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20990223683 is a deficient number, since it is larger than the sum of its proper divisors (5097736957).

20990223683 is a wasteful number, since it uses less digits than its factorization.

20990223683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517 (or 3480 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 20990223683 in words is "twenty billion, nine hundred ninety million, two hundred twenty-three thousand, six hundred eighty-three".