20239716139 has 12 divisors (see below), whose sum is σ = 21400079448. Its totient is φ = 19131275520.

The previous prime is 20239716127. The next prime is 20239716151. The reversal of 20239716139 is 93161793202.

It is an interprime number because it is at equal distance from previous prime (20239716127) and next prime (20239716151).

It is not a de Polignac number, because 20239716139 - 2¹³ = 20239707947 is a prime.

It is a super-3 number, since 3×20239716139³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20239716095 and 20239716104.

It is not an unprimeable number, because it can be changed into a prime (20239716169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203574 + ... + 286219.

It is an arithmetic number, because the mean of its divisors is an integer number (1783339954).

Almost surely, 2^20239716139 is an apocalyptic number.

20239716139 is a deficient number, since it is larger than the sum of its proper divisors (1160363309).

20239716139 is an equidigital number, since it uses as much as digits as its factorization.

20239716139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489898 (or 489867 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 20239716139 in words is "twenty billion, two hundred thirty-nine million, seven hundred sixteen thousand, one hundred thirty-nine".