20100854 has 4 divisors (see below), whose sum is σ = 30151284. Its totient is φ = 10050426.

The previous prime is 20100853. The next prime is 20100877. The reversal of 20100854 is 45800102.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025212 + ... + 5025215.

It is an arithmetic number, because the mean of its divisors is an integer number (7537821).

Almost surely, 2^20100854 is an apocalyptic number.

20100854 is a deficient number, since it is larger than the sum of its proper divisors (10050430).

20100854 is a wasteful number, since it uses less digits than its factorization.

20100854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050429.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20100854 is about 4483.3975955741. The cubic root of 20100854 is about 271.8972633198.

Adding to 20100854 its reverse (45800102), we get a palindrome (65900956).

The spelling of 20100854 in words is "twenty million, one hundred thousand, eight hundred fifty-four".