20749065 has 16 divisors (see below), whose sum is σ = 34344000. Its totient is φ = 10684352.

The previous prime is 20749063. The next prime is 20749067. The reversal of 20749065 is 56094702.

It is an interprime number because it is at equal distance from previous prime (20749063) and next prime (20749067).

It is a cyclic number.

It is not a de Polignac number, because 20749065 - 2¹ = 20749063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20749063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23415 + ... + 24284.

It is an arithmetic number, because the mean of its divisors is an integer number (2146500).

Almost surely, 2^20749065 is an apocalyptic number.

It is an amenable number.

20749065 is a deficient number, since it is larger than the sum of its proper divisors (13594935).

20749065 is a wasteful number, since it uses less digits than its factorization.

20749065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47736.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20749065 is about 4555.1141588329. The cubic root of 20749065 is about 274.7891055263.

The spelling of 20749065 in words is "twenty million, seven hundred forty-nine thousand, sixty-five".