20154040302340 has 24 divisors (see below), whose sum is σ = 48369696725952. Its totient is φ = 6909956675040.

The previous prime is 20154040302317. The next prime is 20154040302349. The reversal of 20154040302340 is 4320304045102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20154040302299 and 20154040302308.

It is not an unprimeable number, because it can be changed into a prime (20154040302349) 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, 71978715226 + ... + 71978715505.

It is an arithmetic number, because the mean of its divisors is an integer number (2015404030248).

Almost surely, 2^{20154040302340} is an apocalyptic number.

20154040302340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154040302340 is an abundant number, since it is smaller than the sum of its proper divisors (28215656423612).

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

20154040302340 is a wasteful number, since it uses less digits than its factorization.

20154040302340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143957430747 (or 143957430745 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20154040302340 its reverse (4320304045102), we get a palindrome (24474344347442).

The spelling of 20154040302340 in words is "twenty trillion, one hundred fifty-four billion, forty million, three hundred two thousand, three hundred forty".