21914145623 has 8 divisors (see below), whose sum is σ = 22296014160. Its totient is φ = 21532625280.

The previous prime is 21914145569. The next prime is 21914145641. The reversal of 21914145623 is 32654141912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21914145623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914145683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41561 + ... + 213437.

It is an arithmetic number, because the mean of its divisors is an integer number (2787001770).

Almost surely, 2^21914145623 is an apocalyptic number.

21914145623 is a deficient number, since it is larger than the sum of its proper divisors (381868537).

21914145623 is a wasteful number, since it uses less digits than its factorization.

21914145623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174097.

The product of its digits is 51840, while the sum is 38.

The spelling of 21914145623 in words is "twenty-one billion, nine hundred fourteen million, one hundred forty-five thousand, six hundred twenty-three".