20440421152 has 24 divisors (see below), whose sum is σ = 40251520512. Its totient is φ = 10217812800.

The previous prime is 20440421083. The next prime is 20440421159. The reversal of 20440421152 is 25112404402.

It is a super-2 number, since 2×20440421152² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20440421159) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67777 + ... + 213247.

It is an arithmetic number, because the mean of its divisors is an integer number (1677146688).

Almost surely, 2^20440421152 is an apocalyptic number.

It is an amenable number.

20440421152 is a deficient number, since it is larger than the sum of its proper divisors (19811099360).

20440421152 is a wasteful number, since it uses less digits than its factorization.

20440421152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149872 (or 149864 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20440421152 its reverse (25112404402), we get a palindrome (45552825554).

The spelling of 20440421152 in words is "twenty billion, four hundred forty million, four hundred twenty-one thousand, one hundred fifty-two".