20413930 has 16 divisors (see below), whose sum is σ = 37159560. Its totient is φ = 8073472.

The previous prime is 20413919. The next prime is 20413931. The reversal of 20413930 is 3931402.

It can be written as a sum of positive squares in 4 ways, for example, as 10673289 + 9740641 = 3267^2 + 3121^2 .

It is not an unprimeable number, because it can be changed into a prime (20413931) 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, 10579 + ... + 12358.

Almost surely, 2^20413930 is an apocalyptic number.

20413930 is a deficient number, since it is larger than the sum of its proper divisors (16745630).

20413930 is a wasteful number, since it uses less digits than its factorization.

20413930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23033.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20413930 is about 4518.1777300146. The cubic root of 20413930 is about 273.3016206846.

The spelling of 20413930 in words is "twenty million, four hundred thirteen thousand, nine hundred thirty".