20727995 has 16 divisors (see below), whose sum is σ = 25857792. Its totient is φ = 15934080.

The previous prime is 20727989. The next prime is 20728009. The reversal of 20727995 is 59972702.

It is a happy number.

It is not a de Polignac number, because 20727995 - 2⁴ = 20727979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26429 + ... + 27201.

It is an arithmetic number, because the mean of its divisors is an integer number (1616112).

Almost surely, 2^20727995 is an apocalyptic number.

20727995 is a deficient number, since it is larger than the sum of its proper divisors (5129797).

20727995 is a wasteful number, since it uses less digits than its factorization.

20727995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 20727995 is about 4552.8007863292. The cubic root of 20727995 is about 274.6960608944.

The spelling of 20727995 in words is "twenty million, seven hundred twenty-seven thousand, nine hundred ninety-five".