20423474 has 8 divisors (see below), whose sum is σ = 31287168. Its totient is φ = 9994420.

The previous prime is 20423449. The next prime is 20423479. The reversal of 20423474 is 47432402.

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

It is not an unprimeable number, because it can be changed into a prime (20423479) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 108542 + ... + 108729.

It is an arithmetic number, because the mean of its divisors is an integer number (3910896).

Almost surely, 2^20423474 is an apocalyptic number.

20423474 is a deficient number, since it is larger than the sum of its proper divisors (10863694).

20423474 is a wasteful number, since it uses less digits than its factorization.

20423474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217320.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 20423474 is about 4519.2337846144. The cubic root of 20423474 is about 273.3442057279.

Adding to 20423474 its reverse (47432402), we get a palindrome (67855876).

The spelling of 20423474 in words is "twenty million, four hundred twenty-three thousand, four hundred seventy-four".