20196531 has 24 divisors (see below), whose sum is σ = 30351360. Its totient is φ = 12927600.

The previous prime is 20196529. The next prime is 20196577. The reversal of 20196531 is 13569102.

20196531 is a `hidden beast` number, since 2 + 0 + 1 + 9 + 653 + 1 = 666.

It is not a de Polignac number, because 20196531 - 2¹ = 20196529 is a prime.

It is a super-2 number, since 2×20196531² = 815799728867922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20196495 and 20196504.

It is not an unprimeable number, because it can be changed into a prime (20196521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53100 + ... + 53478.

It is an arithmetic number, because the mean of its divisors is an integer number (1264640).

Almost surely, 2^20196531 is an apocalyptic number.

20196531 is a deficient number, since it is larger than the sum of its proper divisors (10154829).

20196531 is a wasteful number, since it uses less digits than its factorization.

20196531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 20196531 is about 4494.0550730938. The cubic root of 20196531 is about 272.3279771680.

The spelling of 20196531 in words is "twenty million, one hundred ninety-six thousand, five hundred thirty-one".