20434440102 has 8 divisors (see below), whose sum is σ = 40868880216. Its totient is φ = 6811480032.

The previous prime is 20434440073. The next prime is 20434440109. The reversal of 20434440102 is 20104443402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20434440102 is an admirable number.

It is a super-4 number, since 4×20434440102⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434440109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702870003 + ... + 1702870014.

It is an arithmetic number, because the mean of its divisors is an integer number (5108610027).

Almost surely, 2^20434440102 is an apocalyptic number.

20434440102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20434440102 is a wasteful number, since it uses less digits than its factorization.

20434440102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405740022.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20434440102 its reverse (20104443402), we get a palindrome (40538883504).

The spelling of 20434440102 in words is "twenty billion, four hundred thirty-four million, four hundred forty thousand, one hundred two".