18957681790334 has 24 divisors (see below), whose sum is σ = 33040385645904. Its totient is φ = 7991528601600.

The previous prime is 18957681790283. The next prime is 18957681790337. The reversal of 18957681790334 is 43309718675981.

It is a super-2 number, since 2×18957681790334² (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 (18957681790337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181904387 + ... + 182008574.

It is an arithmetic number, because the mean of its divisors is an integer number (1376682735246).

Almost surely, 2^{18957681790334} is an apocalyptic number.

18957681790334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18957681790334 is a deficient number, since it is larger than the sum of its proper divisors (14082703855570).

18957681790334 is an equidigital number, since it uses as much as digits as its factorization.

18957681790334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363913092 (or 363913031 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 71.

The spelling of 18957681790334 in words is "eighteen trillion, nine hundred fifty-seven billion, six hundred eighty-one million, seven hundred ninety thousand, three hundred thirty-four".