20011523443 has 8 divisors (see below), whose sum is σ = 20146220640. Its totient is φ = 19877091840.

The previous prime is 20011523407. The next prime is 20011523461. The reversal of 20011523443 is 34432511002.

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 20011523443 - 2¹⁷ = 20011392371 is a prime.

It is a super-2 number, since 2×20011523443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011523473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85971 + ... + 217747.

It is an arithmetic number, because the mean of its divisors is an integer number (2518277580).

Almost surely, 2^20011523443 is an apocalyptic number.

20011523443 is a deficient number, since it is larger than the sum of its proper divisors (134697197).

20011523443 is a wasteful number, since it uses less digits than its factorization.

20011523443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132797.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 20011523443 in words is "twenty billion, eleven million, five hundred twenty-three thousand, four hundred forty-three".