20631794194719 has 24 divisors (see below), whose sum is σ = 29839725115200. Its totient is φ = 13736881847808.

The previous prime is 20631794194699. The next prime is 20631794194721. The reversal of 20631794194719 is 91749149713602.

20631794194719 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 179 + 419 + 47 + 1 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20631794194719 is a prime.

It is a super-2 number, since 2×20631794194719² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631794194619) 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, 68101194 + ... + 68403480.

It is an arithmetic number, because the mean of its divisors is an integer number (1243321879800).

Almost surely, 2^{20631794194719} is an apocalyptic number.

20631794194719 is a deficient number, since it is larger than the sum of its proper divisors (9207930920481).

20631794194719 is a wasteful number, since it uses less digits than its factorization.

20631794194719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311999 (or 311996 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 20631794194719 in words is "twenty trillion, six hundred thirty-one billion, seven hundred ninety-four million, one hundred ninety-four thousand, seven hundred nineteen".