20947395 has 16 divisors (see below), whose sum is σ = 38304000. Its totient is φ = 9575904.

The previous prime is 20947393. The next prime is 20947427. The reversal of 20947395 is 59374902.

It is not a de Polignac number, because 20947395 - 2¹ = 20947393 is a prime.

It is a super-3 number, since 3×20947395³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20947391) 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, 99645 + ... + 99854.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^20947395 is an apocalyptic number.

20947395 is a deficient number, since it is larger than the sum of its proper divisors (17356605).

20947395 is a wasteful number, since it uses less digits than its factorization.

20947395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199514.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 20947395 is about 4576.8324199166. The cubic root of 20947395 is about 275.6618548421.

The spelling of 20947395 in words is "twenty million, nine hundred forty-seven thousand, three hundred ninety-five".