20055232521 has 24 divisors (see below), whose sum is σ = 29044704000. Its totient is φ = 13335116832.

The previous prime is 20055232501. The next prime is 20055232541. The reversal of 20055232521 is 12523255002.

It is an interprime number because it is at equal distance from previous prime (20055232501) and next prime (20055232541).

It is not a de Polignac number, because 20055232521 - 2¹⁷ = 20055101449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20055232501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7374600 + ... + 7377318.

It is an arithmetic number, because the mean of its divisors is an integer number (1210196000).

Almost surely, 2^20055232521 is an apocalyptic number.

It is an amenable number.

20055232521 is a deficient number, since it is larger than the sum of its proper divisors (8989471479).

20055232521 is a wasteful number, since it uses less digits than its factorization.

20055232521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573 (or 4570 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 20055232521 its reverse (12523255002), we get a palindrome (32578487523).

The spelling of 20055232521 in words is "twenty billion, fifty-five million, two hundred thirty-two thousand, five hundred twenty-one".