20413642 has 4 divisors (see below), whose sum is σ = 30620466. Its totient is φ = 10206820.

The previous prime is 20413633. The next prime is 20413667. The reversal of 20413642 is 24631402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 423801 = 4471^2 + 651^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103409 + ... + 5103412.

Almost surely, 2^20413642 is an apocalyptic number.

20413642 is a deficient number, since it is larger than the sum of its proper divisors (10206824).

20413642 is a wasteful number, since it uses less digits than its factorization.

20413642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206823.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20413642 is about 4518.1458586460. The cubic root of 20413642 is about 273.3003354309.

The spelling of 20413642 in words is "twenty million, four hundred thirteen thousand, six hundred forty-two".