21072926459599 has 16 divisors (see below), whose sum is σ = 24095830925376. Its totient is φ = 18053144928000.

The previous prime is 21072926459561. The next prime is 21072926459621. The reversal of 21072926459599 is 99595462927012.

It is not a de Polignac number, because 21072926459599 - 2¹³ = 21072926451407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072926459699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221537149 + ... + 221632249.

It is an arithmetic number, because the mean of its divisors is an integer number (1505989432836).

Almost surely, 2^{21072926459599} is an apocalyptic number.

21072926459599 is a deficient number, since it is larger than the sum of its proper divisors (3022904465777).

21072926459599 is a wasteful number, since it uses less digits than its factorization.

21072926459599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111186.

The product of its (nonzero) digits is 220449600, while the sum is 70.

The spelling of 21072926459599 in words is "twenty-one trillion, seventy-two billion, nine hundred twenty-six million, four hundred fifty-nine thousand, five hundred ninety-nine".