20434311424 has 18 divisors (see below), whose sum is σ = 40788801830. Its totient is φ = 10217155584.

The previous prime is 20434311421. The next prime is 20434311433. The reversal of 20434311424 is 42411343402.

It can be written as a sum of positive squares in only one way, i.e., 16891681024 + 3542630400 = 129968^2 + 59520^2 .

It is a super-2 number, since 2×20434311424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20434311392 and 20434311401.

It is not an unprimeable number, because it can be changed into a prime (20434311421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39910509 + ... + 39911020.

Almost surely, 2^20434311424 is an apocalyptic number.

It is an amenable number.

20434311424 is a deficient number, since it is larger than the sum of its proper divisors (20354490406).

20434311424 is an frugal number, since it uses more digits than its factorization.

20434311424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79821545 (or 79821531 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20434311424 its reverse (42411343402), we get a palindrome (62845654826).

The spelling of 20434311424 in words is "twenty billion, four hundred thirty-four million, three hundred eleven thousand, four hundred twenty-four".