20490673803 has 8 divisors (see below), whose sum is σ = 28508763648. Its totient is φ = 13066516584.

The previous prime is 20490673793. The next prime is 20490673807. The reversal of 20490673803 is 30837609402.

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

It is not a de Polignac number, because 20490673803 - 2²⁰ = 20489625227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20490673807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148483075 + ... + 148483212.

It is an arithmetic number, because the mean of its divisors is an integer number (3563595456).

Almost surely, 2^20490673803 is an apocalyptic number.

20490673803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20490673803 is a deficient number, since it is larger than the sum of its proper divisors (8018089845).

20490673803 is a wasteful number, since it uses less digits than its factorization.

20490673803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296966313.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 20490673803 in words is "twenty billion, four hundred ninety million, six hundred seventy-three thousand, eight hundred three".