20225340440 has 32 divisors (see below), whose sum is σ = 45511472160. Its totient is φ = 8089344000.

The previous prime is 20225340431. The next prime is 20225340461. The reversal of 20225340440 is 4404352202.

It is a happy number.

It is a congruent number.

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, 558485 + ... + 593595.

It is an arithmetic number, because the mean of its divisors is an integer number (1422233505).

Almost surely, 2^20225340440 is an apocalyptic number.

20225340440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20225340440 is an abundant number, since it is smaller than the sum of its proper divisors (25286131720).

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

20225340440 is a wasteful number, since it uses less digits than its factorization.

20225340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49523 (or 49519 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 20225340440 its reverse (4404352202), we get a palindrome (24629692642).

The spelling of 20225340440 in words is "twenty billion, two hundred twenty-five million, three hundred forty thousand, four hundred forty".