20143503200 has 144 divisors (see below), whose sum is σ = 50248565136. Its totient is φ = 7883366400.

The previous prime is 20143503197. The next prime is 20143503203. The reversal of 20143503200 is 230534102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20143503197) and next prime (20143503203).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143503203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7649084 + ... + 7651716.

It is an arithmetic number, because the mean of its divisors is an integer number (348948369).

Almost surely, 2^20143503200 is an apocalyptic number.

20143503200 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 20143503200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25124282568).

20143503200 is an abundant number, since it is smaller than the sum of its proper divisors (30105061936).

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

20143503200 is a wasteful number, since it uses less digits than its factorization.

20143503200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The spelling of 20143503200 in words is "twenty billion, one hundred forty-three million, five hundred three thousand, two hundred".