20231021200 has 60 divisors (see below), whose sum is σ = 52343890228. Its totient is φ = 7469913600.

The previous prime is 20231021189. The next prime is 20231021219. The reversal of 20231021200 is 212013202.

It can be written as a sum of positive squares in 6 ways, for example, as 76108176 + 20154913024 = 8724^2 + 141968^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1940091 + ... + 1950490.

Almost surely, 2^20231021200 is an apocalyptic number.

20231021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20231021200 is an abundant number, since it is smaller than the sum of its proper divisors (32112869028).

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

20231021200 is a wasteful number, since it uses less digits than its factorization.

20231021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890612 (or 3890601 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20231021200 its reverse (212013202), we get a palindrome (20443034402).

The spelling of 20231021200 in words is "twenty billion, two hundred thirty-one million, twenty-one thousand, two hundred".