20501223300 has 108 divisors (see below), whose sum is σ = 64400044800. Its totient is φ = 5455074240.

The previous prime is 20501223289. The next prime is 20501223331. The reversal of 20501223300 is 332210502.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 392101 + ... + 441299.

Almost surely, 2^20501223300 is an apocalyptic number.

20501223300 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 20501223300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32200022400).

20501223300 is an abundant number, since it is smaller than the sum of its proper divisors (43898821500).

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

20501223300 is a wasteful number, since it uses less digits than its factorization.

20501223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49682 (or 49672 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20501223300 its reverse (332210502), we get a palindrome (20833433802).

The spelling of 20501223300 in words is "twenty billion, five hundred one million, two hundred twenty-three thousand, three hundred".