20939106403397 has 32 divisors (see below), whose sum is σ = 25918189140480. Its totient is φ = 16472749628160.

The previous prime is 20939106403379. The next prime is 20939106403429. The reversal of 20939106403397 is 79330460193902.

It is a happy number.

It is not a de Polignac number, because 20939106403397 - 2⁶ = 20939106403333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20939106403337) 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 31 ways as a sum of consecutive naturals, for example, 95141879 + ... + 95361707.

It is an arithmetic number, because the mean of its divisors is an integer number (809943410640).

Almost surely, 2^{20939106403397} is an apocalyptic number.

It is an amenable number.

20939106403397 is a deficient number, since it is larger than the sum of its proper divisors (4979082737083).

20939106403397 is a wasteful number, since it uses less digits than its factorization.

20939106403397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225813.

The product of its (nonzero) digits is 6613488, while the sum is 56.

The spelling of 20939106403397 in words is "twenty trillion, nine hundred thirty-nine billion, one hundred six million, four hundred three thousand, three hundred ninety-seven".