20791757319 has 24 divisors (see below), whose sum is σ = 29411117568. Its totient is φ = 13051415520.

The previous prime is 20791757317. The next prime is 20791757417. The reversal of 20791757319 is 91375719702.

It is not a de Polignac number, because 20791757319 - 2¹ = 20791757317 is a prime.

It is a super-2 number, since 2×20791757319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791757317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45664 + ... + 208970.

It is an arithmetic number, because the mean of its divisors is an integer number (1225463232).

Almost surely, 2^20791757319 is an apocalyptic number.

20791757319 is a deficient number, since it is larger than the sum of its proper divisors (8619360249).

20791757319 is a wasteful number, since it uses less digits than its factorization.

20791757319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163415 (or 163378 counting only the distinct ones).

The product of its (nonzero) digits is 833490, while the sum is 51.

The spelling of 20791757319 in words is "twenty billion, seven hundred ninety-one million, seven hundred fifty-seven thousand, three hundred nineteen".