22020737 has 4 divisors (see below), whose sum is σ = 22033620. Its totient is φ = 22007856.

The previous prime is 22020709. The next prime is 22020749. The reversal of 22020737 is 73702022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73702022 = 2 ⋅36851011.

It can be written as a sum of positive squares in 2 ways, for example, as 18395521 + 3625216 = 4289^2 + 1904^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020737 - 2⁶ = 22020673 is a prime.

It is a super-3 number, since 3×22020737³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020767) 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, 3398 + ... + 7455.

It is an arithmetic number, because the mean of its divisors is an integer number (5508405).

Almost surely, 2^22020737 is an apocalyptic number.

It is an amenable number.

22020737 is a deficient number, since it is larger than the sum of its proper divisors (12883).

22020737 is a wasteful number, since it uses less digits than its factorization.

22020737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882.

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

The square root of 22020737 is about 4692.6258107801. The cubic root of 22020737 is about 280.2919446450.

Adding to 22020737 its reverse (73702022), we get a palindrome (95722759).

The spelling of 22020737 in words is "twenty-two million, twenty thousand, seven hundred thirty-seven".