20052172534 has 8 divisors (see below), whose sum is σ = 30645773280. Its totient is φ = 9836914776.

The previous prime is 20052172493. The next prime is 20052172549. The reversal of 20052172534 is 43527125002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20052172496 and 20052172505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94585614 + ... + 94585825.

It is an arithmetic number, because the mean of its divisors is an integer number (3830721660).

Almost surely, 2^20052172534 is an apocalyptic number.

20052172534 is a deficient number, since it is larger than the sum of its proper divisors (10593600746).

20052172534 is a wasteful number, since it uses less digits than its factorization.

20052172534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189171494.

The product of its (nonzero) digits is 16800, while the sum is 31.

Adding to 20052172534 its reverse (43527125002), we get a palindrome (63579297536).

The spelling of 20052172534 in words is "twenty billion, fifty-two million, one hundred seventy-two thousand, five hundred thirty-four".