20423455200 has 216 divisors, whose sum is σ = 73551729888. Its totient is φ = 5330288640.

The previous prime is 20423455187. The next prime is 20423455231. The reversal of 20423455200 is 255432402.

It is a happy number.

20423455200 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 3 + 455 + 200 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 308224 + ... + 368576.

It is an arithmetic number, because the mean of its divisors is an integer number (340517268).

Almost surely, 2^20423455200 is an apocalyptic number.

20423455200 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 20423455200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36775864944).

20423455200 is an abundant number, since it is smaller than the sum of its proper divisors (53128274688).

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

20423455200 is a wasteful number, since it uses less digits than its factorization.

20423455200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60426 (or 60410 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20423455200 its reverse (255432402), we get a palindrome (20678887602).

The spelling of 20423455200 in words is "twenty billion, four hundred twenty-three million, four hundred fifty-five thousand, two hundred".