20430074 has 16 divisors (see below), whose sum is σ = 35838528. Its totient is φ = 8551872.

The previous prime is 20430071. The next prime is 20430077. The reversal of 20430074 is 47003402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20430071) and next prime (20430077).

It is a super-3 number, since 3×20430074³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20430071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16367 + ... + 17570.

It is an arithmetic number, because the mean of its divisors is an integer number (2239908).

Almost surely, 2^20430074 is an apocalyptic number.

20430074 is a deficient number, since it is larger than the sum of its proper divisors (15408454).

20430074 is a wasteful number, since it uses less digits than its factorization.

20430074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33989.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20430074 is about 4519.9639379092. The cubic root of 20430074 is about 273.3736469721.

Adding to 20430074 its reverse (47003402), we get a palindrome (67433476).

The spelling of 20430074 in words is "twenty million, four hundred thirty thousand, seventy-four".