20045223340 has 24 divisors (see below), whose sum is σ = 42125685840. Its totient is φ = 8012238528.

The previous prime is 20045223337. The next prime is 20045223343. The reversal of 20045223340 is 4332254002.

It is an interprime number because it is at equal distance from previous prime (20045223337) and next prime (20045223343).

It is not an unprimeable number, because it can be changed into a prime (20045223343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337530 + ... + 392449.

It is an arithmetic number, because the mean of its divisors is an integer number (1755236910).

Almost surely, 2^20045223340 is an apocalyptic number.

20045223340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045223340 is an abundant number, since it is smaller than the sum of its proper divisors (22080462500).

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

20045223340 is a wasteful number, since it uses less digits than its factorization.

20045223340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731361 (or 731359 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 20045223340 its reverse (4332254002), we get a palindrome (24377477342).

The spelling of 20045223340 in words is "twenty billion, forty-five million, two hundred twenty-three thousand, three hundred forty".