20493325831 has 8 divisors (see below), whose sum is σ = 22363334928. Its totient is φ = 18624480000.

The previous prime is 20493325819. The next prime is 20493325859. The reversal of 20493325831 is 13852339402.

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

It is a cyclic number.

It is not a de Polignac number, because 20493325831 - 2¹⁷ = 20493194759 is a prime.

It is a super-2 number, since 2×20493325831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493325871) 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, 253770 + ... + 324631.

It is an arithmetic number, because the mean of its divisors is an integer number (2795416866).

Almost surely, 2^20493325831 is an apocalyptic number.

20493325831 is a deficient number, since it is larger than the sum of its proper divisors (1870009097).

20493325831 is a wasteful number, since it uses less digits than its factorization.

20493325831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581633.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 20493325831 in words is "twenty billion, four hundred ninety-three million, three hundred twenty-five thousand, eight hundred thirty-one".