20954517 has 8 divisors (see below), whose sum is σ = 27979296. Its totient is φ = 13949712.

The previous prime is 20954509. The next prime is 20954539. The reversal of 20954517 is 71545902.

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

It is not a de Polignac number, because 20954517 - 2³ = 20954509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20958517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2343 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (3497412).

Almost surely, 2^20954517 is an apocalyptic number.

It is an amenable number.

20954517 is a deficient number, since it is larger than the sum of its proper divisors (7024779).

20954517 is an equidigital number, since it uses as much as digits as its factorization.

20954517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 20954517 is about 4577.6104028194. The cubic root of 20954517 is about 275.6930924777.

The spelling of 20954517 in words is "twenty million, nine hundred fifty-four thousand, five hundred seventeen".