20040537 has 32 divisors (see below), whose sum is σ = 30919680. Its totient is φ = 11430720.

The previous prime is 20040533. The next prime is 20040547. The reversal of 20040537 is 73504002.

It is a happy number.

It is not a de Polignac number, because 20040537 - 2² = 20040533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20040533) 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 31 ways as a sum of consecutive naturals, for example, 40908 + ... + 41394.

It is an arithmetic number, because the mean of its divisors is an integer number (966240).

Almost surely, 2^20040537 is an apocalyptic number.

It is an amenable number.

20040537 is a deficient number, since it is larger than the sum of its proper divisors (10879143).

20040537 is a wasteful number, since it uses less digits than its factorization.

20040537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20040537 is about 4476.6658351948. The cubic root of 20040537 is about 271.6250284753.

Adding to 20040537 its reverse (73504002), we get a palindrome (93544539).

The spelling of 20040537 in words is "twenty million, forty thousand, five hundred thirty-seven".