20391739119 has 48 divisors (see below), whose sum is σ = 31672300800. Its totient is φ = 12965675184.

The previous prime is 20391739111. The next prime is 20391739129. The reversal of 20391739119 is 91193719302.

It is not a de Polignac number, because 20391739119 - 2³ = 20391739111 is a prime.

It is a super-2 number, since 2×20391739119² (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 (20391739111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5411374 + ... + 5415140.

It is an arithmetic number, because the mean of its divisors is an integer number (659839600).

Almost surely, 2^20391739119 is an apocalyptic number.

20391739119 is a deficient number, since it is larger than the sum of its proper divisors (11280561681).

20391739119 is a wasteful number, since it uses less digits than its factorization.

20391739119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4172 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The spelling of 20391739119 in words is "twenty billion, three hundred ninety-one million, seven hundred thirty-nine thousand, one hundred nineteen".