20121403344 has 80 divisors (see below), whose sum is σ = 61011654528. Its totient is φ = 5593591296.

The previous prime is 20121403339. The next prime is 20121403363. The reversal of 20121403344 is 44330412102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 796827 + ... + 821690.

Almost surely, 2^20121403344 is an apocalyptic number.

20121403344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20121403344 is an abundant number, since it is smaller than the sum of its proper divisors (40890251184).

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

20121403344 is a wasteful number, since it uses less digits than its factorization.

20121403344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618572 (or 1618566 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20121403344 its reverse (44330412102), we get a palindrome (64451815446).

The spelling of 20121403344 in words is "twenty billion, one hundred twenty-one million, four hundred three thousand, three hundred forty-four".