20917234351 has 8 divisors (see below), whose sum is σ = 22620507840. Its totient is φ = 19227425952.

The previous prime is 20917234339. The next prime is 20917234399. The reversal of 20917234351 is 15343271902.

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 20917234351 - 2⁵ = 20917234319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20917234351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20917234301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3363040 + ... + 3369253.

It is an arithmetic number, because the mean of its divisors is an integer number (2827563480).

Almost surely, 2^20917234351 is an apocalyptic number.

20917234351 is a deficient number, since it is larger than the sum of its proper divisors (1703273489).

20917234351 is a wasteful number, since it uses less digits than its factorization.

20917234351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732545.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 20917234351 in words is "twenty billion, nine hundred seventeen million, two hundred thirty-four thousand, three hundred fifty-one".