20547797 has 8 divisors (see below), whose sum is σ = 21708960. Its totient is φ = 19394640.

The previous prime is 20547773. The next prime is 20547799. The reversal of 20547797 is 79774502.

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 20547797 - 2⁶ = 20547733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547799) 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, 3722 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (2713620).

Almost surely, 2^20547797 is an apocalyptic number.

It is an amenable number.

20547797 is a deficient number, since it is larger than the sum of its proper divisors (1161163).

20547797 is a wasteful number, since it uses less digits than its factorization.

20547797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 20547797 is about 4532.9677916350. The cubic root of 20547797 is about 273.8977232072.

The spelling of 20547797 in words is "twenty million, five hundred forty-seven thousand, seven hundred ninety-seven".