20251103666464 has 48 divisors (see below), whose sum is σ = 43600189883040. Its totient is φ = 9182540828160.

The previous prime is 20251103666449. The next prime is 20251103666501. The reversal of 20251103666464 is 46466630115202.

It is an unprimeable number.

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, 70187994 + ... + 70475929.

It is an arithmetic number, because the mean of its divisors is an integer number (908337289230).

Almost surely, 2^{20251103666464} is an apocalyptic number.

It is an amenable number.

20251103666464 is an abundant number, since it is smaller than the sum of its proper divisors (23349086216576).

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

20251103666464 is a wasteful number, since it uses less digits than its factorization.

20251103666464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140664353 (or 140664345 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 20251103666464 in words is "twenty trillion, two hundred fifty-one billion, one hundred three million, six hundred sixty-six thousand, four hundred sixty-four".