20942007 has 4 divisors (see below), whose sum is σ = 27922680. Its totient is φ = 13961336.

The previous prime is 20941993. The next prime is 20942023. The reversal of 20942007 is 70024902.

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 20942007 - 2²⁴ = 4164791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20942507) 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, 3490332 + ... + 3490337.

It is an arithmetic number, because the mean of its divisors is an integer number (6980670).

Almost surely, 2^20942007 is an apocalyptic number.

20942007 is a deficient number, since it is larger than the sum of its proper divisors (6980673).

20942007 is an equidigital number, since it uses as much as digits as its factorization.

20942007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980672.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20942007 is about 4576.2437653604. The cubic root of 20942007 is about 275.6382179582.

Adding to 20942007 its reverse (70024902), we get a palindrome (90966909).

The spelling of 20942007 in words is "twenty million, nine hundred forty-two thousand, seven".