20110001440 has 48 divisors (see below), whose sum is σ = 48668671800. Its totient is φ = 7847802880.

The previous prime is 20110001419. The next prime is 20110001441. The reversal of 20110001440 is 4410001102.

It can be written as a sum of positive squares in 4 ways, for example, as 5614804624 + 14495196816 = 74932^2 + 120396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20110001440.

It is not an unprimeable number, because it can be changed into a prime (20110001441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526215 + ... + 1539334.

Almost surely, 2^20110001440 is an apocalyptic number.

20110001440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110001440 is an abundant number, since it is smaller than the sum of its proper divisors (28558670360).

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

20110001440 is a wasteful number, since it uses less digits than its factorization.

20110001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065605 (or 3065597 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20110001440 its reverse (4410001102), we get a palindrome (24520002542).

The spelling of 20110001440 in words is "twenty billion, one hundred ten million, one thousand, four hundred forty".