20740711 has 4 divisors (see below), whose sum is σ = 21246624. Its totient is φ = 20234800.

The previous prime is 20740703. The next prime is 20740717. The reversal of 20740711 is 11704702.

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 20740711 - 2³ = 20740703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740717) 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, 252895 + ... + 252976.

It is an arithmetic number, because the mean of its divisors is an integer number (5311656).

Almost surely, 2^20740711 is an apocalyptic number.

20740711 is a deficient number, since it is larger than the sum of its proper divisors (505913).

20740711 is an equidigital number, since it uses as much as digits as its factorization.

20740711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505912.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 20740711 is about 4554.1970752263. The cubic root of 20740711 is about 274.7522219954.

The spelling of 20740711 in words is "twenty million, seven hundred forty thousand, seven hundred eleven".