20866054 has 8 divisors (see below), whose sum is σ = 34144488. Its totient is φ = 9484560.

The previous prime is 20866031. The next prime is 20866057. The reversal of 20866054 is 45066802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20866057) 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 3 ways as a sum of consecutive naturals, for example, 474207 + ... + 474250.

It is an arithmetic number, because the mean of its divisors is an integer number (4268061).

Almost surely, 2^20866054 is an apocalyptic number.

20866054 is a deficient number, since it is larger than the sum of its proper divisors (13278434).

20866054 is a wasteful number, since it uses less digits than its factorization.

20866054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948470.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20866054 is about 4567.9376090310. The cubic root of 20866054 is about 275.3045837376.

The spelling of 20866054 in words is "twenty million, eight hundred sixty-six thousand, fifty-four".