20350213920 has 144 divisors (see below), whose sum is σ = 70622435520. Its totient is φ = 5334723072.

The previous prime is 20350213879. The next prime is 20350213937. The reversal of 20350213920 is 2931205302.

20350213920 is a `hidden beast` number, since 2 + 0 + 3 + 502 + 139 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34804 + ... + 204723.

It is an arithmetic number, because the mean of its divisors is an integer number (490433580).

Almost surely, 2^20350213920 is an apocalyptic number.

20350213920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20350213920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35311217760).

20350213920 is an abundant number, since it is smaller than the sum of its proper divisors (50272221600).

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

20350213920 is a wasteful number, since it uses less digits than its factorization.

20350213920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239607 (or 239596 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

It can be divided in two parts, 20350 and 213920, that added together give a triangular number (234270 = T₆₈₄).

The spelling of 20350213920 in words is "twenty billion, three hundred fifty million, two hundred thirteen thousand, nine hundred twenty".