20012200440 has 32 divisors (see below), whose sum is σ = 60036601680. Its totient is φ = 5336586752.

The previous prime is 20012200427. The next prime is 20012200441. The reversal of 20012200440 is 4400221002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012200441) 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, 83384049 + ... + 83384288.

Almost surely, 2^20012200440 is an apocalyptic number.

20012200440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012200440 is an abundant number, since it is smaller than the sum of its proper divisors (40024401240).

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

20012200440 is a wasteful number, since it uses less digits than its factorization.

20012200440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166768351 (or 166768347 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20012200440 its reverse (4400221002), we get a palindrome (24412421442).

The spelling of 20012200440 in words is "twenty billion, twelve million, two hundred thousand, four hundred forty".