20533840143 has 4 divisors (see below), whose sum is σ = 27378453528. Its totient is φ = 13689226760.

The previous prime is 20533840097. The next prime is 20533840153. The reversal of 20533840143 is 34104833502.

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

It is a cyclic number.

It is not a de Polignac number, because 20533840143 - 2²¹ = 20531742991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533840153) 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, 3422306688 + ... + 3422306693.

It is an arithmetic number, because the mean of its divisors is an integer number (6844613382).

Almost surely, 2^20533840143 is an apocalyptic number.

20533840143 is a deficient number, since it is larger than the sum of its proper divisors (6844613385).

20533840143 is an equidigital number, since it uses as much as digits as its factorization.

20533840143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844613384.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20533840143 in words is "twenty billion, five hundred thirty-three million, eight hundred forty thousand, one hundred forty-three".