20042050521 has 8 divisors (see below), whose sum is σ = 26819207104. Its totient is φ = 13313130480.

The previous prime is 20042050513. The next prime is 20042050549. The reversal of 20042050521 is 12505024002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20042050521 - 2³ = 20042050513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20042050121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12058165 + ... + 12059826.

It is an arithmetic number, because the mean of its divisors is an integer number (3352400888).

Almost surely, 2^20042050521 is an apocalyptic number.

It is an amenable number.

20042050521 is a deficient number, since it is larger than the sum of its proper divisors (6777156583).

20042050521 is a wasteful number, since it uses less digits than its factorization.

20042050521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24118271.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20042050521 its reverse (12505024002), we get a palindrome (32547074523).

The spelling of 20042050521 in words is "twenty billion, forty-two million, fifty thousand, five hundred twenty-one".