20949055 has 8 divisors (see below), whose sum is σ = 25174800. Its totient is φ = 16735296.

The previous prime is 20949023. The next prime is 20949079. The reversal of 20949055 is 55094902.

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 20949055 - 2⁵ = 20949023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20949055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1456 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (3146850).

Almost surely, 2^20949055 is an apocalyptic number.

20949055 is a deficient number, since it is larger than the sum of its proper divisors (4225745).

20949055 is an equidigital number, since it uses as much as digits as its factorization.

20949055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 20949055 is about 4577.0137644538. The cubic root of 20949055 is about 275.6691363616.

The spelling of 20949055 in words is "twenty million, nine hundred forty-nine thousand, fifty-five".