20526131 has 4 divisors (see below), whose sum is σ = 20718072. Its totient is φ = 20334192.

The previous prime is 20526071. The next prime is 20526151. The reversal of 20526131 is 13162502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13162502 = 2 ⋅6581251.

It is a cyclic number.

It is not a de Polignac number, because 20526131 - 2¹⁴ = 20509747 is a prime.

It is a super-2 number, since 2×20526131² = 842644107658322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20526151) 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, 95810 + ... + 96023.

It is an arithmetic number, because the mean of its divisors is an integer number (5179518).

Almost surely, 2^20526131 is an apocalyptic number.

20526131 is a deficient number, since it is larger than the sum of its proper divisors (191941).

20526131 is a wasteful number, since it uses less digits than its factorization.

20526131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191940.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20526131 is about 4530.5773362785. The cubic root of 20526131 is about 273.8014216421.

Adding to 20526131 its reverse (13162502), we get a palindrome (33688633).

The spelling of 20526131 in words is "twenty million, five hundred twenty-six thousand, one hundred thirty-one".