20345154554850 has 288 divisors, whose sum is σ = 54438687468864. Its totient is φ = 5026204915200.

The previous prime is 20345154554849. The next prime is 20345154554863. The reversal of 20345154554850 is 5845545154302.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20345154554793 and 20345154554802.

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 143 ways as a sum of consecutive naturals, for example, 571427149 + ... + 571462751.

It is an arithmetic number, because the mean of its divisors is an integer number (189023220378).

Almost surely, 2^{20345154554850} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20345154554850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27219343734432).

20345154554850 is an abundant number, since it is smaller than the sum of its proper divisors (34093532914014).

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

20345154554850 is a wasteful number, since it uses less digits than its factorization.

20345154554850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35890 (or 35866 counting only the distinct ones).

The product of its (nonzero) digits is 9600000, while the sum is 51.

The spelling of 20345154554850 in words is "twenty trillion, three hundred forty-five billion, one hundred fifty-four million, five hundred fifty-four thousand, eight hundred fifty".