20743707 has 4 divisors (see below), whose sum is σ = 27658280. Its totient is φ = 13829136.

The previous prime is 20743703. The next prime is 20743711. The reversal of 20743707 is 70734702.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20743703) and next prime (20743711).

It is not a de Polignac number, because 20743707 - 2² = 20743703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20743703) 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, 3457282 + ... + 3457287.

It is an arithmetic number, because the mean of its divisors is an integer number (6914570).

Almost surely, 2^20743707 is an apocalyptic number.

20743707 is a deficient number, since it is larger than the sum of its proper divisors (6914573).

20743707 is an equidigital number, since it uses as much as digits as its factorization.

20743707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6914572.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 20743707 is about 4554.5259907042. The cubic root of 20743707 is about 274.7654506969.

The spelling of 20743707 in words is "twenty million, seven hundred forty-three thousand, seven hundred seven".