20491964119 has 8 divisors (see below), whose sum is σ = 22412342160. Its totient is φ = 18581164800.

The previous prime is 20491964111. The next prime is 20491964159. The reversal of 20491964119 is 91146919402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20491964119 - 2³ = 20491964111 is a prime.

It is a super-2 number, since 2×20491964119² (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 (20491964111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390202 + ... + 2398759.

It is an arithmetic number, because the mean of its divisors is an integer number (2801542770).

Almost surely, 2^20491964119 is an apocalyptic number.

20491964119 is a deficient number, since it is larger than the sum of its proper divisors (1920378041).

20491964119 is a wasteful number, since it uses less digits than its factorization.

20491964119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789361.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 20491964119 in words is "twenty billion, four hundred ninety-one million, nine hundred sixty-four thousand, one hundred nineteen".