20615920331919 has 8 divisors (see below), whose sum is σ = 29986793210112. Its totient is φ = 12494497170840.

The previous prime is 20615920331893. The next prime is 20615920331939. The reversal of 20615920331919 is 91913302951602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20615920331919 - 2⁸ = 20615920331663 is a prime.

It is a super-2 number, since 2×20615920331919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615920331939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312362429239 + ... + 312362429304.

It is an arithmetic number, because the mean of its divisors is an integer number (3748349151264).

Almost surely, 2^{20615920331919} is an apocalyptic number.

20615920331919 is a deficient number, since it is larger than the sum of its proper divisors (9370872878193).

20615920331919 is a wasteful number, since it uses less digits than its factorization.

20615920331919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624724858557.

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 20615920331919 in words is "twenty trillion, six hundred fifteen billion, nine hundred twenty million, three hundred thirty-one thousand, nine hundred nineteen".