20344403040 has 96 divisors (see below), whose sum is σ = 69014496096. Its totient is φ = 5007851520.

The previous prime is 20344403039. The next prime is 20344403059. The reversal of 20344403040 is 4030444302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20344403040² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20344403040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1623921 + ... + 1636400.

It is an arithmetic number, because the mean of its divisors is an integer number (718901001).

Almost surely, 2^20344403040 is an apocalyptic number.

20344403040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344403040 is an abundant number, since it is smaller than the sum of its proper divisors (48670093056).

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

20344403040 is a wasteful number, since it uses less digits than its factorization.

20344403040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260352 (or 3260344 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20344403040 its reverse (4030444302), we get a palindrome (24374847342).

The spelling of 20344403040 in words is "twenty billion, three hundred forty-four million, four hundred three thousand, forty".