20220737 has 4 divisors (see below), whose sum is σ = 20238420. Its totient is φ = 20203056.

The previous prime is 20220713. The next prime is 20220751. The reversal of 20220737 is 73702202.

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 19439281 + 781456 = 4409^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220737 - 2¹² = 20216641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6998 + ... + 9455.

It is an arithmetic number, because the mean of its divisors is an integer number (5059605).

Almost surely, 2^20220737 is an apocalyptic number.

It is an amenable number.

20220737 is a deficient number, since it is larger than the sum of its proper divisors (17683).

20220737 is a wasteful number, since it uses less digits than its factorization.

20220737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17682.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20220737 is about 4496.7473800515. The cubic root of 20220737 is about 272.4367308153.

Adding to 20220737 its reverse (73702202), we get a palindrome (93922939).

The spelling of 20220737 in words is "twenty million, two hundred twenty thousand, seven hundred thirty-seven".