20066751 has 16 divisors (see below), whose sum is σ = 30138720. Its totient is φ = 13193280.

The previous prime is 20066731. The next prime is 20066771. The reversal of 20066751 is 15766002.

It is an interprime number because it is at equal distance from previous prime (20066731) and next prime (20066771).

It is not a de Polignac number, because 20066751 - 2⁵ = 20066719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066731) 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, 3120 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (1883670).

Almost surely, 2^20066751 is an apocalyptic number.

20066751 is a deficient number, since it is larger than the sum of its proper divisors (10071969).

20066751 is a wasteful number, since it uses less digits than its factorization.

20066751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263 (or 10257 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20066751 is about 4479.5927270233. The cubic root of 20066751 is about 271.7434098033.

The spelling of 20066751 in words is "twenty million, sixty-six thousand, seven hundred fifty-one".