21040423363 has 8 divisors (see below), whose sum is σ = 21237305760. Its totient is φ = 20843611200.

The previous prime is 21040423333. The next prime is 21040423379. The reversal of 21040423363 is 36332404012.

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

It is a cyclic number.

It is not a de Polignac number, because 21040423363 - 2¹³ = 21040415171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21040423333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733338 + ... + 761488.

It is an arithmetic number, because the mean of its divisors is an integer number (2654663220).

Almost surely, 2^21040423363 is an apocalyptic number.

21040423363 is a deficient number, since it is larger than the sum of its proper divisors (196882397).

21040423363 is a wasteful number, since it uses less digits than its factorization.

21040423363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35117.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21040423363 its reverse (36332404012), we get a palindrome (57372827375).

The spelling of 21040423363 in words is "twenty-one billion, forty million, four hundred twenty-three thousand, three hundred sixty-three".