20706501 has 8 divisors (see below), whose sum is σ = 27753984. Its totient is φ = 13731680.

The previous prime is 20706457. The next prime is 20706503. The reversal of 20706501 is 10560702.

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 20706501 - 2⁷ = 20706373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706503) 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, 17496 + ... + 18641.

It is an arithmetic number, because the mean of its divisors is an integer number (3469248).

Almost surely, 2^20706501 is an apocalyptic number.

It is an amenable number.

20706501 is a deficient number, since it is larger than the sum of its proper divisors (7047483).

20706501 is a wasteful number, since it uses less digits than its factorization.

20706501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36331.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20706501 is about 4550.4396490889. The cubic root of 20706501 is about 274.6010788963.

The spelling of 20706501 in words is "twenty million, seven hundred six thousand, five hundred one".