20003542 has 16 divisors (see below), whose sum is σ = 34014960. Its totient is φ = 8746272.

The previous prime is 20003521. The next prime is 20003549. The reversal of 20003542 is 24530002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003549) 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 7 ways as a sum of consecutive naturals, for example, 19753 + ... + 20740.

It is an arithmetic number, because the mean of its divisors is an integer number (2125935).

Almost surely, 2^20003542 is an apocalyptic number.

20003542 is a deficient number, since it is larger than the sum of its proper divisors (14011418).

20003542 is a wasteful number, since it uses less digits than its factorization.

20003542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40527.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20003542 is about 4472.5319451067. The cubic root of 20003542 is about 271.4577848256.

Adding to 20003542 its reverse (24530002), we get a palindrome (44533544).

The spelling of 20003542 in words is "twenty million, three thousand, five hundred forty-two".