20156042 has 8 divisors (see below), whose sum is σ = 30285696. Its totient is φ = 10060812.

The previous prime is 20156029. The next prime is 20156063. The reversal of 20156042 is 24065102.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7088 + ... + 9515.

It is an arithmetic number, because the mean of its divisors is an integer number (3785712).

Almost surely, 2^20156042 is an apocalyptic number.

20156042 is a deficient number, since it is larger than the sum of its proper divisors (10129654).

20156042 is a wasteful number, since it uses less digits than its factorization.

20156042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17212.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20156042 is about 4489.5480841617. The cubic root of 20156042 is about 272.1458722313.

The spelling of 20156042 in words is "twenty million, one hundred fifty-six thousand, forty-two".