21673369153 has 8 divisors (see below), whose sum is σ = 22430350080. Its totient is φ = 20917029840.

The previous prime is 21673369147. The next prime is 21673369169. The reversal of 21673369153 is 35196337612.

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 21673369153 - 2²¹ = 21671272001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21673369253) 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, 91153 + ... + 227278.

It is an arithmetic number, because the mean of its divisors is an integer number (2803793760).

Almost surely, 2^21673369153 is an apocalyptic number.

It is an amenable number.

21673369153 is a deficient number, since it is larger than the sum of its proper divisors (756980927).

21673369153 is a wasteful number, since it uses less digits than its factorization.

21673369153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320807.

The product of its digits is 612360, while the sum is 46.

The spelling of 21673369153 in words is "twenty-one billion, six hundred seventy-three million, three hundred sixty-nine thousand, one hundred fifty-three".