20321232102 has 32 divisors (see below), whose sum is σ = 45164789760. Its totient is φ = 6772769640.

The previous prime is 20321232097. The next prime is 20321232109. The reversal of 20321232102 is 20123212302.

20321232102 is a `hidden beast` number, since 20 + 321 + 2 + 321 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321232109) 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, 419343 + ... + 465285.

It is an arithmetic number, because the mean of its divisors is an integer number (1411399680).

Almost surely, 2^20321232102 is an apocalyptic number.

20321232102 is an abundant number, since it is smaller than the sum of its proper divisors (24843557658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321232102 is a wasteful number, since it uses less digits than its factorization.

20321232102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54145 (or 54139 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20321232102 its reverse (20123212302), we get a palindrome (40444444404).

The spelling of 20321232102 in words is "twenty billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred two".