22020993 has 6 divisors (see below), whose sum is σ = 31808114. Its totient is φ = 14680656.

The previous prime is 22020991. The next prime is 22021007. The reversal of 22020993 is 39902022.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 2862864 = 4377^2 + 1692^2 .

It is not a de Polignac number, because 22020993 - 2¹ = 22020991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1223380 + ... + 1223397.

Almost surely, 2^22020993 is an apocalyptic number.

It is an amenable number.

22020993 is a deficient number, since it is larger than the sum of its proper divisors (9787121).

22020993 is a wasteful number, since it uses less digits than its factorization.

22020993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446783 (or 2446780 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 22020993 is about 4692.6530875401. The cubic root of 22020993 is about 280.2930308100.

The spelling of 22020993 in words is "twenty-two million, twenty thousand, nine hundred ninety-three".