20471064 has 32 divisors (see below), whose sum is σ = 52563120. Its totient is φ = 6638976.

The previous prime is 20471063. The next prime is 20471089. The reversal of 20471064 is 46017402.

It is a super-2 number, since 2×20471064² = 838128922584192, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10639 + ... + 12414.

Almost surely, 2^20471064 is an apocalyptic number.

20471064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20471064 is an abundant number, since it is smaller than the sum of its proper divisors (32092056).

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

20471064 is a wasteful number, since it uses less digits than its factorization.

20471064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23099 (or 23095 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20471064 is about 4524.4959940307. The cubic root of 20471064 is about 273.5563531141.

Adding to 20471064 its reverse (46017402), we get a palindrome (66488466).

The spelling of 20471064 in words is "twenty million, four hundred seventy-one thousand, sixty-four".