20011524149 has 4 divisors (see below), whose sum is σ = 20014113036. Its totient is φ = 20008935264.

The previous prime is 20011524133. The next prime is 20011524161. The reversal of 20011524149 is 94142511002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10900821649 + 9110702500 = 104407^2 + 95450^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011524149 - 2⁴ = 20011524133 is a prime.

It is a super-2 number, since 2×20011524149² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011524199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282814 + ... + 1298319.

It is an arithmetic number, because the mean of its divisors is an integer number (5003528259).

Almost surely, 2^20011524149 is an apocalyptic number.

It is an amenable number.

20011524149 is a deficient number, since it is larger than the sum of its proper divisors (2588887).

20011524149 is an equidigital number, since it uses as much as digits as its factorization.

20011524149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588886.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 20011524149 in words is "twenty billion, eleven million, five hundred twenty-four thousand, one hundred forty-nine".