18979996823054 has 16 divisors (see below), whose sum is σ = 29399716164480. Its totient is φ = 9180327559680.

The previous prime is 18979996823041. The next prime is 18979996823057. The reversal of 18979996823054 is 45032869997981.

It is a self number, because there is not a number n which added to its sum of digits gives 18979996823054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18979996823057) 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, 58869119 + ... + 59190650.

It is an arithmetic number, because the mean of its divisors is an integer number (1837482260280).

It is a 1-persistent number, because it is pandigital, but 2⋅18979996823054 = 37959993646108 is not.

Almost surely, 2^{18979996823054} is an apocalyptic number.

18979996823054 is a deficient number, since it is larger than the sum of its proper divisors (10419719341426).

18979996823054 is a wasteful number, since it uses less digits than its factorization.

18979996823054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118062395.

The product of its (nonzero) digits is 2116316160, while the sum is 80.

The spelling of 18979996823054 in words is "eighteen trillion, nine hundred seventy-nine billion, nine hundred ninety-six million, eight hundred twenty-three thousand, fifty-four".