20163537 has 12 divisors (see below), whose sum is σ = 29200080. Its totient is φ = 13407768.

The previous prime is 20163529. The next prime is 20163551. The reversal of 20163537 is 73536102.

It is a happy number.

20163537 is a `hidden beast` number, since 20 + 1 + 635 + 3 + 7 = 666.

It is not a de Polignac number, because 20163537 - 2³ = 20163529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20163537.

It is not an unprimeable number, because it can be changed into a prime (20163137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1098 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (2433340).

Almost surely, 2^20163537 is an apocalyptic number.

It is an amenable number.

20163537 is a deficient number, since it is larger than the sum of its proper divisors (9036543).

20163537 is a wasteful number, since it uses less digits than its factorization.

20163537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772 (or 5769 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20163537 is about 4490.3827231095. The cubic root of 20163537 is about 272.1796004229.

Adding to 20163537 its reverse (73536102), we get a palindrome (93699639).

It can be divided in two parts, 20163 and 537, that multiplied together give a triangular number (10827531 = T₄₆₅₃).

The spelling of 20163537 in words is "twenty million, one hundred sixty-three thousand, five hundred thirty-seven".