20745713 has 8 divisors (see below), whose sum is σ = 21315840. Its totient is φ = 20178720.

The previous prime is 20745691. The next prime is 20745761. The reversal of 20745713 is 31754702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20745713 - 2⁶ = 20745649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20745013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19448 + ... + 20486.

It is an arithmetic number, because the mean of its divisors is an integer number (2664480).

Almost surely, 2^20745713 is an apocalyptic number.

It is an amenable number.

20745713 is a deficient number, since it is larger than the sum of its proper divisors (570127).

20745713 is a wasteful number, since it uses less digits than its factorization.

20745713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20745713 is about 4554.7462058824. The cubic root of 20745713 is about 274.7743073866.

The spelling of 20745713 in words is "twenty million, seven hundred forty-five thousand, seven hundred thirteen".