20153440442144 has 48 divisors (see below), whose sum is σ = 41285831787648. Its totient is φ = 9676240334592.

The previous prime is 20153440442141. The next prime is 20153440442159. The reversal of 20153440442144 is 44124404435102.

It is a super-2 number, since 2×20153440442144² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20153440442098 and 20153440442107.

It is not an unprimeable number, because it can be changed into a prime (20153440442141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126334382 + ... + 126493805.

It is an arithmetic number, because the mean of its divisors is an integer number (860121495576).

Almost surely, 2^{20153440442144} is an apocalyptic number.

It is an amenable number.

20153440442144 is an abundant number, since it is smaller than the sum of its proper divisors (21132391345504).

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

20153440442144 is a wasteful number, since it uses less digits than its factorization.

20153440442144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252828297 (or 252828289 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 38.

Adding to 20153440442144 its reverse (44124404435102), we get a palindrome (64277844877246).

The spelling of 20153440442144 in words is "twenty trillion, one hundred fifty-three billion, four hundred forty million, four hundred forty-two thousand, one hundred forty-four".