20100455 has 16 divisors (see below), whose sum is σ = 25075008. Its totient is φ = 15456000.

The previous prime is 20100439. The next prime is 20100463. The reversal of 20100455 is 55400102.

It is not a de Polignac number, because 20100455 - 2⁴ = 20100439 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 15 ways as a sum of consecutive naturals, for example, 13865 + ... + 15245.

It is an arithmetic number, because the mean of its divisors is an integer number (1567188).

Almost surely, 2^20100455 is an apocalyptic number.

20100455 is a deficient number, since it is larger than the sum of its proper divisors (4974553).

20100455 is a wasteful number, since it uses less digits than its factorization.

20100455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20100455 is about 4483.3530978499. The cubic root of 20100455 is about 271.8954642631.

Adding to 20100455 its reverse (55400102), we get a palindrome (75500557).

The spelling of 20100455 in words is "twenty million, one hundred thousand, four hundred fifty-five".