20368729157983 has 8 divisors (see below), whose sum is σ = 20920676721120. Its totient is φ = 19816857456480.

The previous prime is 20368729157977. The next prime is 20368729158013. The reversal of 20368729157983 is 38975192786302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20368729157983 is a prime.

It is a super-2 number, since 2×20368729157983² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368729157923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18420928 + ... + 19495333.

It is an arithmetic number, because the mean of its divisors is an integer number (2615084590140).

Almost surely, 2^{20368729157983} is an apocalyptic number.

20368729157983 is a deficient number, since it is larger than the sum of its proper divisors (551947563137).

20368729157983 is a wasteful number, since it uses less digits than its factorization.

20368729157983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37930817.

The product of its (nonzero) digits is 274337280, while the sum is 70.

The spelling of 20368729157983 in words is "twenty trillion, three hundred sixty-eight billion, seven hundred twenty-nine million, one hundred fifty-seven thousand, nine hundred eighty-three".