20011407744 has 128 divisors (see below), whose sum is σ = 56375261280. Its totient is φ = 6267699200.

The previous prime is 20011407739. The next prime is 20011407749. The reversal of 20011407744 is 44770411002.

It is an interprime number because it is at equal distance from previous prime (20011407739) and next prime (20011407749).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011407749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4573942 + ... + 4578314.

Almost surely, 2^20011407744 is an apocalyptic number.

20011407744 is a gapful number since it is divisible by the number (24) 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 20011407744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28187630640).

20011407744 is an abundant number, since it is smaller than the sum of its proper divisors (36363853536).

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

20011407744 is a wasteful number, since it uses less digits than its factorization.

20011407744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108 (or 5096 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

Adding to 20011407744 its reverse (44770411002), we get a palindrome (64781818746).

The spelling of 20011407744 in words is "twenty billion, eleven million, four hundred seven thousand, seven hundred forty-four".