20438304650 has 24 divisors (see below), whose sum is σ = 39241547904. Its totient is φ = 7911601200.

The previous prime is 20438304631. The next prime is 20438304659. The reversal of 20438304650 is 5640383402.

It is a self number, because there is not a number n which added to its sum of digits gives 20438304650.

It is not an unprimeable number, because it can be changed into a prime (20438304659) 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 11 ways as a sum of consecutive naturals, for example, 6591452 + ... + 6594551.

It is an arithmetic number, because the mean of its divisors is an integer number (1635064496).

Almost surely, 2^20438304650 is an apocalyptic number.

20438304650 is a deficient number, since it is larger than the sum of its proper divisors (18803243254).

20438304650 is a wasteful number, since it uses less digits than its factorization.

20438304650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13186046 (or 13186041 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20438304650 in words is "twenty billion, four hundred thirty-eight million, three hundred four thousand, six hundred fifty".