20344000000 has 140 divisors (see below), whose sum is σ = 50829661872. Its totient is φ = 8134400000.

The previous prime is 20343999983. The next prime is 20344000013. The reversal of 20344000000 is 44302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7998729 + ... + 8001271.

Almost surely, 2^20344000000 is an apocalyptic number.

20344000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20344000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25414830936).

20344000000 is an abundant number, since it is smaller than the sum of its proper divisors (30485661872).

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

20344000000 is an frugal number, since it uses more digits than its factorization.

20344000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

Adding to 20344000000 its reverse (44302), we get a palindrome (20344044302).

The spelling of 20344000000 in words is "twenty billion, three hundred forty-four million", and thus it is an aban number.