20751168919 has 16 divisors (see below), whose sum is σ = 22587715584. Its totient is φ = 18949593600.

The previous prime is 20751168871. The next prime is 20751168923. The reversal of 20751168919 is 91986115702.

It is a cyclic number.

It is not a de Polignac number, because 20751168919 - 2¹⁷ = 20751037847 is a prime.

It is a super-2 number, since 2×20751168919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751168989) 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, 781674 + ... + 807784.

It is an arithmetic number, because the mean of its divisors is an integer number (1411732224).

Almost surely, 2^20751168919 is an apocalyptic number.

20751168919 is a deficient number, since it is larger than the sum of its proper divisors (1836546665).

20751168919 is a wasteful number, since it uses less digits than its factorization.

20751168919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26778.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 20751168919 in words is "twenty billion, seven hundred fifty-one million, one hundred sixty-eight thousand, nine hundred nineteen".