20378001641964 has 24 divisors (see below), whose sum is σ = 47548836290928. Its totient is φ = 6792643529280.

The previous prime is 20378001641953. The next prime is 20378001641981. The reversal of 20378001641964 is 46914610087302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817174 + ... + 6436130.

It is an arithmetic number, because the mean of its divisors is an integer number (1981201512122).

Almost surely, 2^{20378001641964} is an apocalyptic number.

It is an amenable number.

20378001641964 is an abundant number, since it is smaller than the sum of its proper divisors (27170834648964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20378001641964 is a wasteful number, since it uses less digits than its factorization.

20378001641964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921185 (or 5921183 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 20378001641964 in words is "twenty trillion, three hundred seventy-eight billion, one million, six hundred forty-one thousand, nine hundred sixty-four".