20424221416 has 8 divisors (see below), whose sum is σ = 38295415170. Its totient is φ = 10212110704.

The previous prime is 20424221383. The next prime is 20424221417. The reversal of 20424221416 is 61412242402.

It can be written as a sum of positive squares in only one way, i.e., 17783289316 + 2640932100 = 133354^2 + 51390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20424221417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276513831 + ... + 1276513846.

Almost surely, 2^20424221416 is an apocalyptic number.

It is an amenable number.

20424221416 is a deficient number, since it is larger than the sum of its proper divisors (17871193754).

20424221416 is a wasteful number, since it uses less digits than its factorization.

20424221416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553027683 (or 2553027679 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20424221416 its reverse (61412242402), we get a palindrome (81836463818).

The spelling of 20424221416 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, four hundred sixteen".