20424221434 has 4 divisors (see below), whose sum is σ = 30636332154. Its totient is φ = 10212110716.

The previous prime is 20424221423. The next prime is 20424221449. The reversal of 20424221434 is 43412242402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17112564225 + 3311657209 = 130815^2 + 57547^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106055357 + ... + 5106055360.

Almost surely, 2^20424221434 is an apocalyptic number.

20424221434 is a deficient number, since it is larger than the sum of its proper divisors (10212110720).

20424221434 is a wasteful number, since it uses less digits than its factorization.

20424221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10212110719.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20424221434 its reverse (43412242402), we get a palindrome (63836463836).

The spelling of 20424221434 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, four hundred thirty-four".