20914287 has 8 divisors (see below), whose sum is σ = 28639536. Its totient is φ = 13565952.

The previous prime is 20914279. The next prime is 20914319. The reversal of 20914287 is 78241902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20914287 - 2³ = 20914279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20914207) 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, 94098 + ... + 94319.

It is an arithmetic number, because the mean of its divisors is an integer number (3579942).

Almost surely, 2^20914287 is an apocalyptic number.

20914287 is a deficient number, since it is larger than the sum of its proper divisors (7725249).

20914287 is a wasteful number, since it uses less digits than its factorization.

20914287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188457.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20914287 is about 4573.2140776482. The cubic root of 20914287 is about 275.5165475901.

The spelling of 20914287 in words is "twenty million, nine hundred fourteen thousand, two hundred eighty-seven".