20632293989 has 4 divisors (see below), whose sum is σ = 20689765920. Its totient is φ = 20574822060.

The previous prime is 20632293943. The next prime is 20632293991. The reversal of 20632293989 is 98939223602.

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 a cyclic number.

It is not a de Polignac number, because 20632293989 - 2¹² = 20632289893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20632293989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632290989) 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 3 ways as a sum of consecutive naturals, for example, 28735427 + ... + 28736144.

It is an arithmetic number, because the mean of its divisors is an integer number (5172441480).

Almost surely, 2^20632293989 is an apocalyptic number.

It is an amenable number.

20632293989 is a deficient number, since it is larger than the sum of its proper divisors (57471931).

20632293989 is an equidigital number, since it uses as much as digits as its factorization.

20632293989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57471930.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The spelling of 20632293989 in words is "twenty billion, six hundred thirty-two million, two hundred ninety-three thousand, nine hundred eighty-nine".