20159621417 has 32 divisors (see below), whose sum is σ = 23170350336. Its totient is φ = 17398022400.

The previous prime is 20159621407. The next prime is 20159621473. The reversal of 20159621417 is 71412695102.

It is a cyclic number.

It is not a de Polignac number, because 20159621417 - 2⁴ = 20159621401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20159621407) 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 31 ways as a sum of consecutive naturals, for example, 2969567 + ... + 2976347.

It is an arithmetic number, because the mean of its divisors is an integer number (724073448).

Almost surely, 2^20159621417 is an apocalyptic number.

It is an amenable number.

20159621417 is a deficient number, since it is larger than the sum of its proper divisors (3010728919).

20159621417 is a wasteful number, since it uses less digits than its factorization.

20159621417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 20159621417 in words is "twenty billion, one hundred fifty-nine million, six hundred twenty-one thousand, four hundred seventeen".