20716995 has 32 divisors (see below), whose sum is σ = 36013824. Its totient is φ = 10108800.

The previous prime is 20716987. The next prime is 20717023. The reversal of 20716995 is 59961702.

It is not a de Polignac number, because 20716995 - 2³ = 20716987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 25140 + ... + 25950.

It is an arithmetic number, because the mean of its divisors is an integer number (1125432).

Almost surely, 2^20716995 is an apocalyptic number.

20716995 is a deficient number, since it is larger than the sum of its proper divisors (15296829).

20716995 is a wasteful number, since it uses less digits than its factorization.

20716995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 20716995 is about 4551.5925784279. The cubic root of 20716995 is about 274.6474600956.

The spelling of 20716995 in words is "twenty million, seven hundred sixteen thousand, nine hundred ninety-five".