20914187 has 8 divisors (see below), whose sum is σ = 23957472. Its totient is φ = 17884800.

The previous prime is 20914177. The next prime is 20914189. The reversal of 20914187 is 78141902.

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 20914187 - 2⁶ = 20914123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20914189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (2994684).

Almost surely, 2^20914187 is an apocalyptic number.

20914187 is a deficient number, since it is larger than the sum of its proper divisors (3043285).

20914187 is an equidigital number, since it uses as much as digits as its factorization.

20914187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 20914187 is about 4573.2031444055. The cubic root of 20914187 is about 275.5161084693.

The spelling of 20914187 in words is "twenty million, nine hundred fourteen thousand, one hundred eighty-seven".