20471700 has 36 divisors (see below), whose sum is σ = 59232320. Its totient is φ = 5459040.

The previous prime is 20471699. The next prime is 20471713. The reversal of 20471700 is 717402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33820 + ... + 34419.

Almost surely, 2^20471700 is an apocalyptic number.

20471700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20471700 is an abundant number, since it is smaller than the sum of its proper divisors (38760620).

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

20471700 is a wasteful number, since it uses less digits than its factorization.

20471700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68256 (or 68249 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20471700 is about 4524.5662775563. The cubic root of 20471700 is about 273.5591860565.

The spelling of 20471700 in words is "twenty million, four hundred seventy-one thousand, seven hundred".