20054102521 has 16 divisors (see below), whose sum is σ = 20639773440. Its totient is φ = 19477560960.

The previous prime is 20054102507. The next prime is 20054102543. The reversal of 20054102521 is 12520145002.

It is a cyclic number.

It is not a de Polignac number, because 20054102521 - 2⁵ = 20054102489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20054102492 and 20054102501.

It is not an unprimeable number, because it can be changed into a prime (20054102561) 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, 4533891 + ... + 4538311.

It is an arithmetic number, because the mean of its divisors is an integer number (1289985840).

Almost surely, 2^20054102521 is an apocalyptic number.

It is an amenable number.

20054102521 is a deficient number, since it is larger than the sum of its proper divisors (585670919).

20054102521 is an equidigital number, since it uses as much as digits as its factorization.

20054102521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 20054102521 its reverse (12520145002), we get a palindrome (32574247523).

The spelling of 20054102521 in words is "twenty billion, fifty-four million, one hundred two thousand, five hundred twenty-one".