20308474 has 8 divisors (see below), whose sum is σ = 30764628. Its totient is φ = 10053600.

The previous prime is 20308447. The next prime is 20308481. The reversal of 20308474 is 47480302.

It can be written as a sum of positive squares in 2 ways, for example, as 19298449 + 1010025 = 4393^2 + 1005^2 .

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

It is a zygodrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50067 + ... + 50470.

Almost surely, 2^20308474 is an apocalyptic number.

20308474 is a deficient number, since it is larger than the sum of its proper divisors (10456154).

20308474 is a wasteful number, since it uses less digits than its factorization.

20308474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100640.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20308474 is about 4506.4924275982. The cubic root of 20308474 is about 272.8301931219.

Adding to 20308474 its reverse (47480302), we get a palindrome (67788776).

The spelling of 20308474 in words is "twenty million, three hundred eight thousand, four hundred seventy-four".