20981327600 has 60 divisors (see below), whose sum is σ = 53060692440. Its totient is φ = 7950816000.

The previous prime is 20981327567. The next prime is 20981327663. The reversal of 20981327600 is 672318902.

It is a super-2 number, since 2×20981327600² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 1372751 + ... + 1387950.

It is an arithmetic number, because the mean of its divisors is an integer number (884344874).

Almost surely, 2^20981327600 is an apocalyptic number.

20981327600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20981327600 is an abundant number, since it is smaller than the sum of its proper divisors (32079364840).

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

20981327600 is a wasteful number, since it uses less digits than its factorization.

20981327600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760738 (or 2760727 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20981327600 in words is "twenty billion, nine hundred eighty-one million, three hundred twenty-seven thousand, six hundred".