20532537 has 12 divisors (see below), whose sum is σ = 30947904. Its totient is φ = 13093080.

The previous prime is 20532517. The next prime is 20532569. The reversal of 20532537 is 73523502.

It is not a de Polignac number, because 20532537 - 2¹⁹ = 20008249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20532537.

It is not an unprimeable number, because it can be changed into a prime (20532517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49389 + ... + 49802.

It is an arithmetic number, because the mean of its divisors is an integer number (2578992).

Almost surely, 2^20532537 is an apocalyptic number.

It is an amenable number.

20532537 is a deficient number, since it is larger than the sum of its proper divisors (10415367).

20532537 is a wasteful number, since it uses less digits than its factorization.

20532537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99220 (or 99217 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 20532537 is about 4531.2842550429. The cubic root of 20532537 is about 273.8299022404.

The spelling of 20532537 in words is "twenty million, five hundred thirty-two thousand, five hundred thirty-seven".