20420102144 has 96 divisors (see below), whose sum is σ = 45884180160. Its totient is φ = 9014624256.

The previous prime is 20420102107. The next prime is 20420102179. The reversal of 20420102144 is 44120102402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595679 + ... + 629025.

It is an arithmetic number, because the mean of its divisors is an integer number (477960210).

Almost surely, 2^20420102144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20420102144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22942090080).

20420102144 is an abundant number, since it is smaller than the sum of its proper divisors (25464078016).

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

20420102144 is a wasteful number, since it uses less digits than its factorization.

20420102144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33405 (or 33385 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20420102144 its reverse (44120102402), we get a palindrome (64540204546).

The spelling of 20420102144 in words is "twenty billion, four hundred twenty million, one hundred two thousand, one hundred forty-four".