20011533143 has 32 divisors (see below), whose sum is σ = 24254121600. Its totient is φ = 16149805056.

The previous prime is 20011533103. The next prime is 20011533161. The reversal of 20011533143 is 34133511002.

It is not a de Polignac number, because 20011533143 - 2¹⁰ = 20011532119 is a prime.

It is a super-2 number, since 2×20011533143² (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 (20011533103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1311305 + ... + 1326477.

It is an arithmetic number, because the mean of its divisors is an integer number (757941300).

Almost surely, 2^20011533143 is an apocalyptic number.

20011533143 is a deficient number, since it is larger than the sum of its proper divisors (4242588457).

20011533143 is a wasteful number, since it uses less digits than its factorization.

20011533143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15371.

The product of its (nonzero) digits is 1080, while the sum is 23.

The spelling of 20011533143 in words is "twenty billion, eleven million, five hundred thirty-three thousand, one hundred forty-three".