223020012440 has 64 divisors (see below), whose sum is σ = 528416222400. Its totient is φ = 84546519552.

The previous prime is 223020012427. The next prime is 223020012469. The reversal of 223020012440 is 44210020322.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1011707 + ... + 1212266.

It is an arithmetic number, because the mean of its divisors is an integer number (8256503475).

Almost surely, 2^223020012440 is an apocalyptic number.

223020012440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223020012440 is an abundant number, since it is smaller than the sum of its proper divisors (305396209960).

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

223020012440 is a wasteful number, since it uses less digits than its factorization.

223020012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224116 (or 2224112 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 223020012440 its reverse (44210020322), we get a palindrome (267230032762).

The spelling of 223020012440 in words is "two hundred twenty-three billion, twenty million, twelve thousand, four hundred forty".