20334001440 has 96 divisors (see below), whose sum is σ = 64156518720. Its totient is φ = 5413561344.

The previous prime is 20334001409. The next prime is 20334001451. The reversal of 20334001440 is 4410043302.

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

It is a super-2 number, since 2×20334001440² (a number of 21 digits) contains 22 as substring.

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, 262902 + ... + 331338.

It is an arithmetic number, because the mean of its divisors is an integer number (668297070).

Almost surely, 2^20334001440 is an apocalyptic number.

20334001440 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 20334001440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32078259360).

20334001440 is an abundant number, since it is smaller than the sum of its proper divisors (43822517280).

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

20334001440 is a wasteful number, since it uses less digits than its factorization.

20334001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69074 (or 69066 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20334001440 its reverse (4410043302), we get a palindrome (24744044742).

The spelling of 20334001440 in words is "twenty billion, three hundred thirty-four million, one thousand, four hundred forty".