20155042 has 8 divisors (see below), whose sum is σ = 30402000. Its totient is φ = 10021044.

The previous prime is 20155039. The next prime is 20155073. The reversal of 20155042 is 24055102.

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

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, 27792 + ... + 28507.

It is an arithmetic number, because the mean of its divisors is an integer number (3800250).

Almost surely, 2^20155042 is an apocalyptic number.

20155042 is a deficient number, since it is larger than the sum of its proper divisors (10246958).

20155042 is a wasteful number, since it uses less digits than its factorization.

20155042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56480.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20155042 is about 4489.4367129964. The cubic root of 20155042 is about 272.1413715068.

The spelling of 20155042 in words is "twenty million, one hundred fifty-five thousand, forty-two".