20502542 has 8 divisors (see below), whose sum is σ = 31504032. Its totient is φ = 10001200.

The previous prime is 20502533. The next prime is 20502553. The reversal of 20502542 is 24520502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124934 + ... + 125097.

It is an arithmetic number, because the mean of its divisors is an integer number (3938004).

Almost surely, 2^20502542 is an apocalyptic number.

20502542 is a deficient number, since it is larger than the sum of its proper divisors (11001490).

20502542 is a wasteful number, since it uses less digits than its factorization.

20502542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250074.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20502542 is about 4527.9732773063. The cubic root of 20502542 is about 273.6964955933.

The spelling of 20502542 in words is "twenty million, five hundred two thousand, five hundred forty-two".