20070142 has 4 divisors (see below), whose sum is σ = 30105216. Its totient is φ = 10035070.

The previous prime is 20070139. The next prime is 20070143. The reversal of 20070142 is 24107002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20070143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5017534 + ... + 5017537.

It is an arithmetic number, because the mean of its divisors is an integer number (7526304).

Almost surely, 2^20070142 is an apocalyptic number.

20070142 is a deficient number, since it is larger than the sum of its proper divisors (10035074).

20070142 is a wasteful number, since it uses less digits than its factorization.

20070142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035073.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20070142 is about 4479.9712052646. The cubic root of 20070142 is about 271.7587158851.

Adding to 20070142 its reverse (24107002), we get a palindrome (44177144).

The spelling of 20070142 in words is "twenty million, seventy thousand, one hundred forty-two".