20440311024 has 160 divisors (see below), whose sum is σ = 61406069760. Its totient is φ = 5738489856.

The previous prime is 20440311007. The next prime is 20440311041. The reversal of 20440311024 is 42011304402.

It is an interprime number because it is at equal distance from previous prime (20440311007) and next prime (20440311041).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4991922 + ... + 4996014.

It is an arithmetic number, because the mean of its divisors is an integer number (383787936).

Almost surely, 2^20440311024 is an apocalyptic number.

20440311024 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 20440311024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30703034880).

20440311024 is an abundant number, since it is smaller than the sum of its proper divisors (40965758736).

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

20440311024 is a wasteful number, since it uses less digits than its factorization.

20440311024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367 (or 4361 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20440311024 its reverse (42011304402), we get a palindrome (62451615426).

The spelling of 20440311024 in words is "twenty billion, four hundred forty million, three hundred eleven thousand, twenty-four".