20340502440454 has 16 divisors (see below), whose sum is σ = 35207970939648. Its totient is φ = 8632723642632.

The previous prime is 20340502440431. The next prime is 20340502440473. The reversal of 20340502440454 is 45404420504302.

It is a super-3 number, since 3×20340502440454³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7052877352 + ... + 7052880235.

It is an arithmetic number, because the mean of its divisors is an integer number (2200498183728).

Almost surely, 2^{20340502440454} is an apocalyptic number.

20340502440454 is a deficient number, since it is larger than the sum of its proper divisors (14867468499194).

20340502440454 is a wasteful number, since it uses less digits than its factorization.

20340502440454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105757699.

The product of its (nonzero) digits is 307200, while the sum is 37.

Adding to 20340502440454 its reverse (45404420504302), we get a palindrome (65744922944756).

The spelling of 20340502440454 in words is "twenty trillion, three hundred forty billion, five hundred two million, four hundred forty thousand, four hundred fifty-four".