20444642 has 8 divisors (see below), whose sum is σ = 32470956. Its totient is φ = 9620992.

The previous prime is 20444639. The next prime is 20444689. The reversal of 20444642 is 24644402.

It can be written as a sum of positive squares in 2 ways, for example, as 16638241 + 3806401 = 4079^2 + 1951^2 .

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, 300623 + ... + 300690.

Almost surely, 2^20444642 is an apocalyptic number.

20444642 is a deficient number, since it is larger than the sum of its proper divisors (12026314).

20444642 is a wasteful number, since it uses less digits than its factorization.

20444642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601332.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 20444642 is about 4521.5751680139. The cubic root of 20444642 is about 273.4386093909.

The spelling of 20444642 in words is "twenty million, four hundred forty-four thousand, six hundred forty-two".