20205154 has 8 divisors (see below), whose sum is σ = 30494160. Its totient is φ = 10040436.

The previous prime is 20205139. The next prime is 20205193. The reversal of 20205154 is 45150202.

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

It is an unprimeable number.

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, 30664 + ... + 31315.

It is an arithmetic number, because the mean of its divisors is an integer number (3811770).

Almost surely, 2^20205154 is an apocalyptic number.

20205154 is a deficient number, since it is larger than the sum of its proper divisors (10289006).

20205154 is a wasteful number, since it uses less digits than its factorization.

20205154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62144.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20205154 is about 4495.0143492541. The cubic root of 20205154 is about 272.3667288728.

Adding to 20205154 its reverse (45150202), we get a palindrome (65355356).

The spelling of 20205154 in words is "twenty million, two hundred five thousand, one hundred fifty-four".