2123520500 has 48 divisors (see below), whose sum is σ = 4648722624. Its totient is φ = 847402400.

The previous prime is 2123520467. The next prime is 2123520533. The reversal of 2123520500 is 50253212.

It is an interprime number because it is at equal distance from previous prime (2123520467) and next prime (2123520533).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216707 + ... + 226293.

It is an arithmetic number, because the mean of its divisors is an integer number (96848388).

Almost surely, 2^2123520500 is an apocalyptic number.

2123520500 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 2123520500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2324361312).

2123520500 is an abundant number, since it is smaller than the sum of its proper divisors (2525202124).

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

2123520500 is a wasteful number, since it uses less digits than its factorization.

2123520500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10049 (or 10037 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2123520500 is about 46081.6720616776. The cubic root of 2123520500 is about 1285.3423565581.

Adding to 2123520500 its reverse (50253212), we get a palindrome (2173773712).

The spelling of 2123520500 in words is "two billion, one hundred twenty-three million, five hundred twenty thousand, five hundred".