20224321440 has 48 divisors (see below), whose sum is σ = 63706614048. Its totient is φ = 5393152256.

The previous prime is 20224321399. The next prime is 20224321459. The reversal of 20224321440 is 4412342202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20224321440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21066522 + ... + 21067481.

It is an arithmetic number, because the mean of its divisors is an integer number (1327221126).

Almost surely, 2^20224321440 is an apocalyptic number.

20224321440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20224321440 is an abundant number, since it is smaller than the sum of its proper divisors (43482292608).

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

20224321440 is a wasteful number, since it uses less digits than its factorization.

20224321440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42134021 (or 42134013 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20224321440 its reverse (4412342202), we get a palindrome (24636663642).

The spelling of 20224321440 in words is "twenty billion, two hundred twenty-four million, three hundred twenty-one thousand, four hundred forty".