20512362420 has 72 divisors (see below), whose sum is σ = 67877278560. Its totient is φ = 4972693440.

The previous prime is 20512362419. The next prime is 20512362473. The reversal of 20512362420 is 2426321502.

It is a happy number.

20512362420 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 236 + 2 + 420 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5177910 + ... + 5181869.

It is an arithmetic number, because the mean of its divisors is an integer number (942739980).

Almost surely, 2^20512362420 is an apocalyptic number.

20512362420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20512362420 is an abundant number, since it is smaller than the sum of its proper divisors (47364916140).

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

20512362420 is a wasteful number, since it uses less digits than its factorization.

20512362420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359805 (or 10359800 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20512362420 its reverse (2426321502), we get a palindrome (22938683922).

The spelling of 20512362420 in words is "twenty billion, five hundred twelve million, three hundred sixty-two thousand, four hundred twenty".