20471208 has 32 divisors (see below), whose sum is σ = 53872800. Its totient is φ = 6464448.

The previous prime is 20471201. The next prime is 20471233. The reversal of 20471208 is 80217402.

It is a super-3 number, since 3×20471208³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20471201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21991 + ... + 22902.

It is an arithmetic number, because the mean of its divisors is an integer number (1683525).

Almost surely, 2^20471208 is an apocalyptic number.

It is an amenable number.

20471208 is an abundant number, since it is smaller than the sum of its proper divisors (33401592).

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

20471208 is a wasteful number, since it uses less digits than its factorization.

20471208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44921 (or 44917 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20471208 is about 4524.5119073774. The cubic root of 20471208 is about 273.5569945401.

The spelling of 20471208 in words is "twenty million, four hundred seventy-one thousand, two hundred eight".