20703508449 has 8 divisors (see below), whose sum is σ = 29728114752. Its totient is φ = 12740620560.

The previous prime is 20703508421. The next prime is 20703508451. The reversal of 20703508449 is 94480530702.

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

It is not a de Polignac number, because 20703508449 - 2⁵ = 20703508417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20703508449.

It is not an unprimeable number, because it can be changed into a prime (20703508649) 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 7 ways as a sum of consecutive naturals, for example, 265429557 + ... + 265429634.

It is an arithmetic number, because the mean of its divisors is an integer number (3716014344).

Almost surely, 2^20703508449 is an apocalyptic number.

It is an amenable number.

20703508449 is a deficient number, since it is larger than the sum of its proper divisors (9024606303).

20703508449 is a wasteful number, since it uses less digits than its factorization.

20703508449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530859207.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 20703508449 in words is "twenty billion, seven hundred three million, five hundred eight thousand, four hundred forty-nine".