21372851599 has 8 divisors (see below), whose sum is σ = 23317886592. Its totient is φ = 19428158040.

The previous prime is 21372851573. The next prime is 21372851629. The reversal of 21372851599 is 99515827312.

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 21372851599 - 2⁵ = 21372851567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21372851519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55672 + ... + 214114.

It is an arithmetic number, because the mean of its divisors is an integer number (2914735824).

Almost surely, 2^21372851599 is an apocalyptic number.

21372851599 is a deficient number, since it is larger than the sum of its proper divisors (1945034993).

21372851599 is a wasteful number, since it uses less digits than its factorization.

21372851599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170717.

The product of its digits is 1360800, while the sum is 52.

The spelling of 21372851599 in words is "twenty-one billion, three hundred seventy-two million, eight hundred fifty-one thousand, five hundred ninety-nine".