20354205453736 has 64 divisors (see below), whose sum is σ = 47928568164480. Its totient is φ = 7872325140480.

The previous prime is 20354205453719. The next prime is 20354205453821. The reversal of 20354205453736 is 63735450245302.

It is a self number, because there is not a number n which added to its sum of digits gives 20354205453736.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120508825 + ... + 120677608.

It is an arithmetic number, because the mean of its divisors is an integer number (748883877570).

Almost surely, 2^{20354205453736} is an apocalyptic number.

It is an amenable number.

20354205453736 is an abundant number, since it is smaller than the sum of its proper divisors (27574362710744).

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

20354205453736 is a wasteful number, since it uses less digits than its factorization.

20354205453736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241186594 (or 241186590 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 49.

The spelling of 20354205453736 in words is "twenty trillion, three hundred fifty-four billion, two hundred five million, four hundred fifty-three thousand, seven hundred thirty-six".