20351243021200 has 240 divisors, whose sum is σ = 60277253147776. Its totient is φ = 6430109184000.

The previous prime is 20351243021183. The next prime is 20351243021209. The reversal of 20351243021200 is 212034215302.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20351243021209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21411259 + ... + 22341541.

Almost surely, 2^{20351243021200} is an apocalyptic number.

20351243021200 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 20351243021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30138626573888).

20351243021200 is an abundant number, since it is smaller than the sum of its proper divisors (39926010126576).

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

20351243021200 is a wasteful number, since it uses less digits than its factorization.

20351243021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930922 (or 930911 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20351243021200 its reverse (212034215302), we get a palindrome (20563277236502).

The spelling of 20351243021200 in words is "twenty trillion, three hundred fifty-one billion, two hundred forty-three million, twenty-one thousand, two hundred".