20079938 has 4 divisors (see below), whose sum is σ = 30119910. Its totient is φ = 10039968.

The previous prime is 20079931. The next prime is 20079973. The reversal of 20079938 is 83997002.

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., 17497489 + 2582449 = 4183^2 + 1607^2 .

It is not an unprimeable number, because it can be changed into a prime (20079931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5019983 + ... + 5019986.

Almost surely, 2^20079938 is an apocalyptic number.

20079938 is a deficient number, since it is larger than the sum of its proper divisors (10039972).

20079938 is a wasteful number, since it uses less digits than its factorization.

20079938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039971.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20079938 is about 4481.0643824877. The cubic root of 20079938 is about 271.8029227701.

The spelling of 20079938 in words is "twenty million, seventy-nine thousand, nine hundred thirty-eight".