20125911 has 8 divisors (see below), whose sum is σ = 28898800. Its totient is φ = 12385152.

The previous prime is 20125907. The next prime is 20125979. The reversal of 20125911 is 11952102.

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

It is not a de Polignac number, because 20125911 - 2² = 20125907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257986 + ... + 258063.

It is an arithmetic number, because the mean of its divisors is an integer number (3612350).

Almost surely, 2^20125911 is an apocalyptic number.

20125911 is a deficient number, since it is larger than the sum of its proper divisors (8772889).

20125911 is a wasteful number, since it uses less digits than its factorization.

20125911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516065.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 20125911 is about 4486.1911461729. The cubic root of 20125911 is about 272.0101955160.

The spelling of 20125911 in words is "twenty million, one hundred twenty-five thousand, nine hundred eleven".