20351664085152 has 384 divisors, whose sum is σ = 60183955722240. Its totient is φ = 5991382425600.

The previous prime is 20351664085111. The next prime is 20351664085153. The reversal of 20351664085152 is 25158046615302.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20351664085153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335711548 + ... + 335772164.

It is an arithmetic number, because the mean of its divisors is an integer number (156729051360).

Almost surely, 2^{20351664085152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20351664085152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30091977861120).

20351664085152 is an abundant number, since it is smaller than the sum of its proper divisors (39832291637088).

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

20351664085152 is a wasteful number, since it uses less digits than its factorization.

20351664085152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60876 (or 60868 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 20351664085152 in words is "twenty trillion, three hundred fifty-one billion, six hundred sixty-four million, eighty-five thousand, one hundred fifty-two".