20126534 has 4 divisors (see below), whose sum is σ = 30189804. Its totient is φ = 10063266.

The previous prime is 20126527. The next prime is 20126563. The reversal of 20126534 is 43562102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031632 + ... + 5031635.

It is an arithmetic number, because the mean of its divisors is an integer number (7547451).

Almost surely, 2^20126534 is an apocalyptic number.

20126534 is a deficient number, since it is larger than the sum of its proper divisors (10063270).

20126534 is a wasteful number, since it uses less digits than its factorization.

20126534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063269.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20126534 is about 4486.2605809293. The cubic root of 20126534 is about 272.0130021899.

Adding to 20126534 its reverse (43562102), we get a palindrome (63688636).

The spelling of 20126534 in words is "twenty million, one hundred twenty-six thousand, five hundred thirty-four".