20440433000 has 64 divisors (see below), whose sum is σ = 51509923920. Its totient is φ = 7547232000.

The previous prime is 20440432973. The next prime is 20440433047. The reversal of 20440433000 is 33404402.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 254274916 + 20186158084 = 15946^2 + 142078^2 .

It is a super-2 number, since 2×20440433000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773171 + ... + 799170.

Almost surely, 2^20440433000 is an apocalyptic number.

20440433000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440433000 is an abundant number, since it is smaller than the sum of its proper divisors (31069490920).

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

20440433000 is a wasteful number, since it uses less digits than its factorization.

20440433000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572375 (or 1572361 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20440433000 its reverse (33404402), we get a palindrome (20473837402).

The spelling of 20440433000 in words is "twenty billion, four hundred forty million, four hundred thirty-three thousand".