20424503121 has 16 divisors (see below), whose sum is σ = 30211902720.
Its totient is φ = 12168680720.
The previous prime is 20424503107. The next prime is 20424503129. The reversal of 20424503121 is 12130542402.
It is a cyclic number.
It is not a de Polignac number, because 20424503121 - 222 = 20420308817 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 20424503091 and 20424503100.
It is not an unprimeable number, because it can be changed into a prime (20424503129) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5243175 + ... + 5247068.
It is an arithmetic number, because the mean of its divisors is an integer number (1888243920).
Almost surely, 220424503121 is an apocalyptic number.
It is an amenable number.
20424503121 is a deficient number, since it is larger than the sum of its proper divisors (9787399599).
20424503121 is a wasteful number, since it uses less digits than its factorization.
20424503121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10490316.
The product of its (nonzero) digits is 1920, while the sum is 24.
The spelling of 20424503121 in words is "twenty billion, four hundred twenty-four million, five hundred three thousand, one hundred twenty-one".