20133542 has 64 divisors (see below), whose sum is σ = 38864448. Its totient is φ = 7680000.

The previous prime is 20133527. The next prime is 20133551. The reversal of 20133542 is 24533102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 199292 + ... + 199392.

It is an arithmetic number, because the mean of its divisors is an integer number (607257).

Almost surely, 2^20133542 is an apocalyptic number.

20133542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20133542 is a deficient number, since it is larger than the sum of its proper divisors (18730906).

20133542 is a wasteful number, since it uses less digits than its factorization.

20133542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20133542 is about 4487.0415643272. The cubic root of 20133542 is about 272.0445699023.

Adding to 20133542 its reverse (24533102), we get a palindrome (44666644).

It can be divided in two parts, 2013 and 3542, that added together give a palindrome (5555).

The spelling of 20133542 in words is "twenty million, one hundred thirty-three thousand, five hundred forty-two".