21140242413423 has 8 divisors (see below), whose sum is σ = 32213702725248. Its totient is φ = 12080138521944.

The previous prime is 21140242413421. The next prime is 21140242413439. The reversal of 21140242413423 is 32431424204112.

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

It is not a de Polignac number, because 21140242413423 - 2¹ = 21140242413421 is a prime.

It is a super-3 number, since 3×21140242413423³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140242413421) 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, 503339105061 + ... + 503339105102.

It is an arithmetic number, because the mean of its divisors is an integer number (4026712840656).

Almost surely, 2^{21140242413423} is an apocalyptic number.

21140242413423 is a deficient number, since it is larger than the sum of its proper divisors (11073460311825).

21140242413423 is a wasteful number, since it uses less digits than its factorization.

21140242413423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006678210173.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 21140242413423 its reverse (32431424204112), we get a palindrome (53571666617535).

The spelling of 21140242413423 in words is "twenty-one trillion, one hundred forty billion, two hundred forty-two million, four hundred thirteen thousand, four hundred twenty-three".