20106251143 has 4 divisors (see below), whose sum is σ = 21934092168. Its totient is φ = 18278410120.

The previous prime is 20106251111. The next prime is 20106251147. The reversal of 20106251143 is 34115260102.

It is a happy number.

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 20106251143 - 2⁵ = 20106251111 is a prime.

It is a super-2 number, since 2×20106251143² (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 (20106251147) 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, 913920496 + ... + 913920517.

It is an arithmetic number, because the mean of its divisors is an integer number (5483523042).

Almost surely, 2^20106251143 is an apocalyptic number.

20106251143 is a deficient number, since it is larger than the sum of its proper divisors (1827841025).

20106251143 is a wasteful number, since it uses less digits than its factorization.

20106251143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827841024.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 20106251143 in words is "twenty billion, one hundred six million, two hundred fifty-one thousand, one hundred forty-three".