20388118450634 has 16 divisors (see below), whose sum is σ = 33363154091520. Its totient is φ = 9267110333760.

The previous prime is 20388118450597. The next prime is 20388118450663. The reversal of 20388118450634 is 43605481188302.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9845519 + ... + 11735010.

It is an arithmetic number, because the mean of its divisors is an integer number (2085197130720).

Almost surely, 2^{20388118450634} is an apocalyptic number.

20388118450634 is a deficient number, since it is larger than the sum of its proper divisors (12975035640886).

20388118450634 is a wasteful number, since it uses less digits than its factorization.

20388118450634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21623485.

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 20388118450634 in words is "twenty trillion, three hundred eighty-eight billion, one hundred eighteen million, four hundred fifty thousand, six hundred thirty-four".