20146655 has 4 divisors (see below), whose sum is σ = 24175992. Its totient is φ = 16117320.

The previous prime is 20146639. The next prime is 20146681. The reversal of 20146655 is 55664102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20146655 - 2⁴ = 20146639 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014661 + ... + 2014670.

It is an arithmetic number, because the mean of its divisors is an integer number (6043998).

Almost surely, 2^20146655 is an apocalyptic number.

20146655 is a deficient number, since it is larger than the sum of its proper divisors (4029337).

20146655 is an equidigital number, since it uses as much as digits as its factorization.

20146655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029336.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20146655 is about 4488.5025342535. The cubic root of 20146655 is about 272.1036180694.

The spelling of 20146655 in words is "twenty million, one hundred forty-six thousand, six hundred fifty-five".