20742011 has 4 divisors (see below), whose sum is σ = 21034224. Its totient is φ = 20449800.

The previous prime is 20741947. The next prime is 20742017. The reversal of 20742011 is 11024702.

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 20742011 - 2⁶ = 20741947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20742017) 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, 146000 + ... + 146141.

It is an arithmetic number, because the mean of its divisors is an integer number (5258556).

Almost surely, 2^20742011 is an apocalyptic number.

20742011 is a deficient number, since it is larger than the sum of its proper divisors (292213).

20742011 is an equidigital number, since it uses as much as digits as its factorization.

20742011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292212.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20742011 is about 4554.3397984779. The cubic root of 20742011 is about 274.7579622427.

Adding to 20742011 its reverse (11024702), we get a palindrome (31766713).

The spelling of 20742011 in words is "twenty million, seven hundred forty-two thousand, eleven".