20521253300 has 36 divisors (see below), whose sum is σ = 45094822080. Its totient is φ = 8104593120.

The previous prime is 20521253261. The next prime is 20521253323. The reversal of 20521253300 is 335212502.

It is a super-2 number, since 2×20521253300² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1290914 + ... + 1306713.

Almost surely, 2^20521253300 is an apocalyptic number.

20521253300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20521253300 is an abundant number, since it is smaller than the sum of its proper divisors (24573568780).

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

20521253300 is a wasteful number, since it uses less digits than its factorization.

20521253300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597720 (or 2597713 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 20521253300 its reverse (335212502), we get a palindrome (20856465802).

The spelling of 20521253300 in words is "twenty billion, five hundred twenty-one million, two hundred fifty-three thousand, three hundred".