20740030 has 16 divisors (see below), whose sum is σ = 37844784. Its totient is φ = 8182080.

The previous prime is 20740021. The next prime is 20740063. The reversal of 20740030 is 3004702.

It is a junction number, because it is equal to n+sod(n) for n = 20739986 and 20740013.

It is a congruent number.

It is an unprimeable number.

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, 13476 + ... + 14935.

It is an arithmetic number, because the mean of its divisors is an integer number (2365299).

Almost surely, 2^20740030 is an apocalyptic number.

20740030 is a deficient number, since it is larger than the sum of its proper divisors (17104754).

20740030 is a wasteful number, since it uses less digits than its factorization.

20740030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28491.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20740030 is about 4554.1223084147. The cubic root of 20740030 is about 274.7492148933.

Adding to 20740030 its reverse (3004702), we get a palindrome (23744732).

The spelling of 20740030 in words is "twenty million, seven hundred forty thousand, thirty".