20150011 has 4 divisors (see below), whose sum is σ = 23028592. Its totient is φ = 17271432.

The previous prime is 20149973. The next prime is 20150021. The reversal of 20150011 is 11005102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11005102 = 2 ⋅5502551.

It is a cyclic number.

It is not a de Polignac number, because 20150011 - 2¹⁵ = 20117243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20150011.

It is not an unprimeable number, because it can be changed into a prime (20150021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439280 + ... + 1439293.

It is an arithmetic number, because the mean of its divisors is an integer number (5757148).

Almost surely, 2^20150011 is an apocalyptic number.

20150011 is a deficient number, since it is larger than the sum of its proper divisors (2878581).

20150011 is an equidigital number, since it uses as much as digits as its factorization.

20150011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878580.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 20150011 is about 4488.8763627438. The cubic root of 20150011 is about 272.1187261033.

Adding to 20150011 its reverse (11005102), we get a palindrome (31155113).

The spelling of 20150011 in words is "twenty million, one hundred fifty thousand, eleven".