20000142 has 16 divisors (see below), whose sum is σ = 44444880. Its totient is φ = 6666696.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000142 is 24100002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185133 + ... + 185240.

It is an arithmetic number, because the mean of its divisors is an integer number (2777805).

Almost surely, 2^20000142 is an apocalyptic number.

20000142 is an abundant number, since it is smaller than the sum of its proper divisors (24444738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20000142 is a wasteful number, since it uses less digits than its factorization.

20000142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370384 (or 370378 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20000142 is about 4472.1518310540. The cubic root of 20000142 is about 271.4424040701.

Adding to 20000142 its reverse (24100002), we get a palindrome (44100144).

The spelling of 20000142 in words is "twenty million, one hundred forty-two", and thus it is an aban number.