20157894463 has 8 divisors (see below), whose sum is σ = 23038624928. Its totient is φ = 17277421824.

The previous prime is 20157894451. The next prime is 20157894479. The reversal of 20157894463 is 36449875102.

It is a happy number.

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 20157894463 - 2⁵ = 20157894431 is a prime.

It is the 141979-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157894563) by changing a digit.

It is a nontrivial repunit in base 141978.

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 7 ways as a sum of consecutive naturals, for example, 151195 + ... + 251347.

It is an arithmetic number, because the mean of its divisors is an integer number (2879828116).

It is a 2-persistent number, because it is pandigital, and so is 2⋅20157894463 = 40315788926, but 3⋅20157894463 = 60473683389 is not.

Almost surely, 2^20157894463 is an apocalyptic number.

20157894463 is a deficient number, since it is larger than the sum of its proper divisors (2880730465).

20157894463 is a wasteful number, since it uses less digits than its factorization.

20157894463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128913.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 20157894463 in words is "twenty billion, one hundred fifty-seven million, eight hundred ninety-four thousand, four hundred sixty-three".