20515670200 has 48 divisors (see below), whose sum is σ = 48862341360. Its totient is φ = 8006112000.

The previous prime is 20515670179. The next prime is 20515670207. The reversal of 20515670200 is 207651502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20515670207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1242756 + ... + 1259155.

It is an arithmetic number, because the mean of its divisors is an integer number (1017965445).

Almost surely, 2^20515670200 is an apocalyptic number.

20515670200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20515670200 is an abundant number, since it is smaller than the sum of its proper divisors (28346671160).

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

20515670200 is a wasteful number, since it uses less digits than its factorization.

20515670200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501968 (or 2501959 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 20515670200 in words is "twenty billion, five hundred fifteen million, six hundred seventy thousand, two hundred".