20342100100 has 108 divisors (see below), whose sum is σ = 51542117760. Its totient is φ = 6948244800.

The previous prime is 20342100089. The next prime is 20342100101. The reversal of 20342100100 is 100124302.

It is not an unprimeable number, because it can be changed into a prime (20342100101) 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 35 ways as a sum of consecutive naturals, for example, 1320241 + ... + 1335559.

Almost surely, 2^20342100100 is an apocalyptic number.

20342100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20342100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25771058880).

20342100100 is an abundant number, since it is smaller than the sum of its proper divisors (31200017660).

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

20342100100 is a wasteful number, since it uses less digits than its factorization.

20342100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618 (or 15604 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20342100100 its reverse (100124302), we get a palindrome (20442224402).

The spelling of 20342100100 in words is "twenty billion, three hundred forty-two million, one hundred thousand, one hundred".