20110013440 has 176 divisors, whose sum is σ = 55398697920. Its totient is φ = 6927482880.

The previous prime is 20110013437. The next prime is 20110013479. The reversal of 20110013440 is 4431001102.

It is a tau number, because it is divible by the number of its divisors (176).

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 1060684 + ... + 1079476.

Almost surely, 2^20110013440 is an apocalyptic number.

20110013440 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 20110013440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27699348960).

20110013440 is an abundant number, since it is smaller than the sum of its proper divisors (35288684480).

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

20110013440 is a wasteful number, since it uses less digits than its factorization.

20110013440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18848 (or 18830 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20110013440 its reverse (4431001102), we get a palindrome (24541014542).

The spelling of 20110013440 in words is "twenty billion, one hundred ten million, thirteen thousand, four hundred forty".