20344920920 has 16 divisors (see below), whose sum is σ = 45776072160. Its totient is φ = 8137968352.

The previous prime is 20344920863. The next prime is 20344920929. The reversal of 20344920920 is 2902944302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344920929) 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 3 ways as a sum of consecutive naturals, for example, 254311472 + ... + 254311551.

It is an arithmetic number, because the mean of its divisors is an integer number (2861004510).

Almost surely, 2^20344920920 is an apocalyptic number.

20344920920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344920920 is an abundant number, since it is smaller than the sum of its proper divisors (25431151240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20344920920 is a wasteful number, since it uses less digits than its factorization.

20344920920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508623034 (or 508623030 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 20344920920 in words is "twenty billion, three hundred forty-four million, nine hundred twenty thousand, nine hundred twenty".