21803597097 has 8 divisors (see below), whose sum is σ = 29073588000. Its totient is φ = 14534668800.

The previous prime is 21803597083. The next prime is 21803597111. The reversal of 21803597097 is 79079530812.

It is an interprime number because it is at equal distance from previous prime (21803597083) and next prime (21803597111).

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

It is not a de Polignac number, because 21803597097 - 2¹² = 21803593001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21803597797) 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, 216472 + ... + 300777.

It is an arithmetic number, because the mean of its divisors is an integer number (3634198500).

Almost surely, 2^21803597097 is an apocalyptic number.

It is an amenable number.

21803597097 is a deficient number, since it is larger than the sum of its proper divisors (7269990903).

21803597097 is a wasteful number, since it uses less digits than its factorization.

21803597097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531303.

The product of its (nonzero) digits is 952560, while the sum is 51.

The spelling of 21803597097 in words is "twenty-one billion, eight hundred three million, five hundred ninety-seven thousand, ninety-seven".