20470342 has 8 divisors (see below), whose sum is σ = 30823056. Its totient is φ = 10195992.

The previous prime is 20470339. The next prime is 20470343. The reversal of 20470342 is 24307402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20470342³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20470343) 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 3 ways as a sum of consecutive naturals, for example, 18933 + ... + 19984.

It is an arithmetic number, because the mean of its divisors is an integer number (3852882).

Almost surely, 2^20470342 is an apocalyptic number.

20470342 is a deficient number, since it is larger than the sum of its proper divisors (10352714).

20470342 is a wasteful number, since it uses less digits than its factorization.

20470342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39182.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20470342 is about 4524.4162054347. The cubic root of 20470342 is about 273.5531370297.

Adding to 20470342 its reverse (24307402), we get a palindrome (44777744).

The spelling of 20470342 in words is "twenty million, four hundred seventy thousand, three hundred forty-two".