20122812239 has 4 divisors (see below), whose sum is σ = 21181907640. Its totient is φ = 19063716840.

The previous prime is 20122812209. The next prime is 20122812247. The reversal of 20122812239 is 93221822102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122812239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122812209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529547672 + ... + 529547709.

It is an arithmetic number, because the mean of its divisors is an integer number (5295476910).

Almost surely, 2^20122812239 is an apocalyptic number.

20122812239 is a deficient number, since it is larger than the sum of its proper divisors (1059095401).

20122812239 is a wasteful number, since it uses less digits than its factorization.

20122812239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059095400.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 20122812239 in words is "twenty billion, one hundred twenty-two million, eight hundred twelve thousand, two hundred thirty-nine".