20545655 has 8 divisors (see below), whose sum is σ = 26551392. Its totient is φ = 15172128.

The previous prime is 20545607. The next prime is 20545663. The reversal of 20545655 is 55654502.

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 20545655 - 2²² = 16351351 is a prime.

It is a Duffinian number.

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, 157979 + ... + 158108.

It is an arithmetic number, because the mean of its divisors is an integer number (3318924).

Almost surely, 2^20545655 is an apocalyptic number.

20545655 is a deficient number, since it is larger than the sum of its proper divisors (6005737).

20545655 is a wasteful number, since it uses less digits than its factorization.

20545655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316105.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 20545655 is about 4532.7315164258. The cubic root of 20545655 is about 273.8882054097. Note that the first 3 decimals are identical.

The spelling of 20545655 in words is "twenty million, five hundred forty-five thousand, six hundred fifty-five".