20078836239 has 16 divisors (see below), whose sum is σ = 33377806080. Its totient is φ = 10430564160.

The previous prime is 20078836231. The next prime is 20078836243. The reversal of 20078836239 is 93263887002.

It is a happy number.

It is not a de Polignac number, because 20078836239 - 2³ = 20078836231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078836231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43460454 + ... + 43460915.

It is an arithmetic number, because the mean of its divisors is an integer number (2086112880).

Almost surely, 2^20078836239 is an apocalyptic number.

20078836239 is a deficient number, since it is larger than the sum of its proper divisors (13298969841).

20078836239 is a wasteful number, since it uses less digits than its factorization.

20078836239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86921390.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20078836239 in words is "twenty billion, seventy-eight million, eight hundred thirty-six thousand, two hundred thirty-nine".