20020437 has 6 divisors (see below), whose sum is σ = 28918422. Its totient is φ = 13346952.

The previous prime is 20020421. The next prime is 20020439. The reversal of 20020437 is 73402002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 7017201 = 3606^2 + 2649^2 .

It is not a de Polignac number, because 20020437 - 2⁴ = 20020421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112238 + ... + 1112255.

It is an arithmetic number, because the mean of its divisors is an integer number (4819737).

Almost surely, 2^20020437 is an apocalyptic number.

It is an amenable number.

20020437 is a deficient number, since it is larger than the sum of its proper divisors (8897985).

20020437 is a wasteful number, since it uses less digits than its factorization.

20020437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224499 (or 2224496 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20020437 is about 4474.4202976475. The cubic root of 20020437 is about 271.5341877728.

Adding to 20020437 its reverse (73402002), we get a palindrome (93422439).

The spelling of 20020437 in words is "twenty million, twenty thousand, four hundred thirty-seven".