20910115 has 8 divisors (see below), whose sum is σ = 25410240. Its totient is φ = 16516032.

The previous prime is 20910103. The next prime is 20910121. The reversal of 20910115 is 51101902.

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

It is a cyclic number.

It is not a de Polignac number, because 20910115 - 2¹⁵ = 20877347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20910092 and 20910101.

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 7 ways as a sum of consecutive naturals, for example, 26074 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (3176280).

Almost surely, 2^20910115 is an apocalyptic number.

20910115 is a deficient number, since it is larger than the sum of its proper divisors (4500125).

20910115 is an equidigital number, since it uses as much as digits as its factorization.

20910115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53021.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 20910115 is about 4572.7579205552. The cubic root of 20910115 is about 275.4982262790.

It can be divided in two parts, 20910 and 115, that added together give a square (21025 = 145²).

The spelling of 20910115 in words is "twenty million, nine hundred ten thousand, one hundred fifteen".