20101042 has 8 divisors (see below), whose sum is σ = 32470956. Its totient is φ = 9277392.

The previous prime is 20101013. The next prime is 20101073. The reversal of 20101042 is 24010102.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 39601 = 4479^2 + 199^2 .

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, 386533 + ... + 386584.

Almost surely, 2^20101042 is an apocalyptic number.

20101042 is a deficient number, since it is larger than the sum of its proper divisors (12369914).

20101042 is a wasteful number, since it uses less digits than its factorization.

20101042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773132.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20101042 is about 4483.4185617673. The cubic root of 20101042 is about 271.8981109873.

Adding to 20101042 its reverse (24010102), we get a palindrome (44111144).

The spelling of 20101042 in words is "twenty million, one hundred one thousand, forty-two".