20009474 has 8 divisors (see below), whose sum is σ = 30376080. Its totient is φ = 9884116.

The previous prime is 20009453. The next prime is 20009497. The reversal of 20009474 is 47490002.

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

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, 60104 + ... + 60435.

It is an arithmetic number, because the mean of its divisors is an integer number (3797010).

Almost surely, 2^20009474 is an apocalyptic number.

20009474 is a deficient number, since it is larger than the sum of its proper divisors (10366606).

20009474 is a wasteful number, since it uses less digits than its factorization.

20009474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120624.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20009474 is about 4473.1950549915. The cubic root of 20009474 is about 271.4846155477.

Adding to 20009474 its reverse (47490002), we get a palindrome (67499476).

The spelling of 20009474 in words is "twenty million, nine thousand, four hundred seventy-four".