20440072450 has 24 divisors (see below), whose sum is σ = 43449754752. Its totient is φ = 7008024720.

The previous prime is 20440072421. The next prime is 20440072463. The reversal of 20440072450 is 5427004402.

It is a happy number.

It is a super-2 number, since 2×20440072450² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29199754 + ... + 29200453.

It is an arithmetic number, because the mean of its divisors is an integer number (1810406448).

Almost surely, 2^20440072450 is an apocalyptic number.

20440072450 is an abundant number, since it is smaller than the sum of its proper divisors (23009682302).

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

20440072450 is a wasteful number, since it uses less digits than its factorization.

20440072450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58400226 (or 58400221 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

Adding to 20440072450 its reverse (5427004402), we get a palindrome (25867076852).

The spelling of 20440072450 in words is "twenty billion, four hundred forty million, seventy-two thousand, four hundred fifty".