20077237 has 4 divisors (see below), whose sum is σ = 20149996. Its totient is φ = 20004480.

The previous prime is 20077217. The next prime is 20077247. The reversal of 20077237 is 73277002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5262436 + 14814801 = 2294^2 + 3849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20077237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077217) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 35964 + ... + 36517.

It is an arithmetic number, because the mean of its divisors is an integer number (5037499).

Almost surely, 2^20077237 is an apocalyptic number.

It is an amenable number.

20077237 is a deficient number, since it is larger than the sum of its proper divisors (72759).

20077237 is an equidigital number, since it uses as much as digits as its factorization.

20077237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72758.

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 20077237 is about 4480.7629930627. The cubic root of 20077237 is about 271.7907352721.

The spelling of 20077237 in words is "twenty million, seventy-seven thousand, two hundred thirty-seven".