20440434300 has 144 divisors (see below), whose sum is σ = 69480469632. Its totient is φ = 4574073600.

The previous prime is 20440434299. The next prime is 20440434317. The reversal of 20440434300 is 343404402.

It is a happy number.

It is a super-2 number, since 2×20440434300² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195334 + ... + 281133.

Almost surely, 2^20440434300 is an apocalyptic number.

20440434300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440434300 is an abundant number, since it is smaller than the sum of its proper divisors (49040035332).

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

20440434300 is a wasteful number, since it uses less digits than its factorization.

20440434300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476508 (or 476501 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20440434300 its reverse (343404402), we get a palindrome (20783838702).

The spelling of 20440434300 in words is "twenty billion, four hundred forty million, four hundred thirty-four thousand, three hundred".