20555102 has 4 divisors (see below), whose sum is σ = 30832656. Its totient is φ = 10277550.

The previous prime is 20555083. The next prime is 20555141. The reversal of 20555102 is 20155502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20155502 = 2 ⋅10077751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138774 + ... + 5138777.

It is an arithmetic number, because the mean of its divisors is an integer number (7708164).

Almost surely, 2^20555102 is an apocalyptic number.

20555102 is a deficient number, since it is larger than the sum of its proper divisors (10277554).

20555102 is a wasteful number, since it uses less digits than its factorization.

20555102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10277553.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20555102 is about 4533.7734835344. The cubic root of 20555102 is about 273.9301773888.

The spelling of 20555102 in words is "twenty million, five hundred fifty-five thousand, one hundred two".