20077042 has 4 divisors (see below), whose sum is σ = 30115566. Its totient is φ = 10038520.

The previous prime is 20077033. The next prime is 20077067. The reversal of 20077042 is 24077002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24077002 = 2 ⋅12038501.

It can be written as a sum of positive squares in only one way, i.e., 17799961 + 2277081 = 4219^2 + 1509^2 .

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5019259 + ... + 5019262.

Almost surely, 2^20077042 is an apocalyptic number.

20077042 is a deficient number, since it is larger than the sum of its proper divisors (10038524).

20077042 is a wasteful number, since it uses less digits than its factorization.

20077042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038523.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 20077042 is about 4480.7412333229. The cubic root of 20077042 is about 271.7898553475.

The spelling of 20077042 in words is "twenty million, seventy-seven thousand, forty-two".