20051521041 has 4 divisors (see below), whose sum is σ = 26735361392. Its totient is φ = 13367680692.

The previous prime is 20051521013. The next prime is 20051521159. The reversal of 20051521041 is 14012515002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20051521041 - 2⁹ = 20051520529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20051520999 and 20051521017.

It is not an unprimeable number, because it can be changed into a prime (20051521241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3341920171 + ... + 3341920176.

It is an arithmetic number, because the mean of its divisors is an integer number (6683840348).

Almost surely, 2^20051521041 is an apocalyptic number.

It is an amenable number.

20051521041 is a deficient number, since it is larger than the sum of its proper divisors (6683840351).

20051521041 is an equidigital number, since it uses as much as digits as its factorization.

20051521041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683840350.

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 20051521041 in words is "twenty billion, fifty-one million, five hundred twenty-one thousand, forty-one".