20221007 has 4 divisors (see below), whose sum is σ = 21410496. Its totient is φ = 19031520.

The previous prime is 20220983. The next prime is 20221009. The reversal of 20221007 is 70012202.

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

It is a cyclic number.

It is not a de Polignac number, because 20221007 - 2⁸ = 20220751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220982 and 20221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221009) 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, 594719 + ... + 594752.

It is an arithmetic number, because the mean of its divisors is an integer number (5352624).

Almost surely, 2^20221007 is an apocalyptic number.

20221007 is a deficient number, since it is larger than the sum of its proper divisors (1189489).

20221007 is a wasteful number, since it uses less digits than its factorization.

20221007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189488.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20221007 is about 4496.7774016511. Note that the first 3 decimals coincide. The cubic root of 20221007 is about 272.4379433921.

Adding to 20221007 its reverse (70012202), we get a palindrome (90233209).

The spelling of 20221007 in words is "twenty million, two hundred twenty-one thousand, seven".