20210542 has 16 divisors (see below), whose sum is σ = 33156864. Its totient is φ = 9163000.

The previous prime is 20210539. The next prime is 20210551. The reversal of 20210542 is 24501202.

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 7 ways as a sum of consecutive naturals, for example, 9867 + ... + 11737.

It is an arithmetic number, because the mean of its divisors is an integer number (2072304).

Almost surely, 2^20210542 is an apocalyptic number.

20210542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20210542 is a deficient number, since it is larger than the sum of its proper divisors (12946322).

20210542 is a wasteful number, since it uses less digits than its factorization.

20210542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20210542 is about 4495.6136399829. The cubic root of 20210542 is about 272.3909369125.

Adding to 20210542 its reverse (24501202), we get a palindrome (44711744).

The spelling of 20210542 in words is "twenty million, two hundred ten thousand, five hundred forty-two".