20525004143 has 8 divisors (see below), whose sum is σ = 23471757312. Its totient is φ = 17581903416.

The previous prime is 20525004139. The next prime is 20525004169. The reversal of 20525004143 is 34140052502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20525004143 - 2² = 20525004139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525004133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901055 + ... + 923552.

It is an arithmetic number, because the mean of its divisors is an integer number (2933969664).

Almost surely, 2^20525004143 is an apocalyptic number.

20525004143 is a deficient number, since it is larger than the sum of its proper divisors (2946753169).

20525004143 is a wasteful number, since it uses less digits than its factorization.

20525004143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826221.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20525004143 its reverse (34140052502), we get a palindrome (54665056645).

The spelling of 20525004143 in words is "twenty billion, five hundred twenty-five million, four thousand, one hundred forty-three".