20434431044 has 12 divisors (see below), whose sum is σ = 35772311568. Its totient is φ = 10213770600.

The previous prime is 20434431041. The next prime is 20434431071. The reversal of 20434431044 is 44013443402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20434430998 and 20434431016.

It is not an unprimeable number, because it can be changed into a prime (20434431041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847862 + ... + 871629.

It is an arithmetic number, because the mean of its divisors is an integer number (2981025964).

Almost surely, 2^20434431044 is an apocalyptic number.

It is an amenable number.

20434431044 is a deficient number, since it is larger than the sum of its proper divisors (15337880524).

20434431044 is a wasteful number, since it uses less digits than its factorization.

20434431044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722466 (or 1722464 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 20434431044 its reverse (44013443402), we get a palindrome (64447874446).

The spelling of 20434431044 in words is "twenty billion, four hundred thirty-four million, four hundred thirty-one thousand, forty-four".