20000140 has 24 divisors (see below), whose sum is σ = 43449840. Its totient is φ = 7723968.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000140 is 4100002.

20000140 is a modest number, since divided by 140 gives 20 as remainder.

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

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 7 ways as a sum of consecutive naturals, for example, 16662 + ... + 17821.

It is an arithmetic number, because the mean of its divisors is an integer number (1810410).

Almost surely, 2^20000140 is an apocalyptic number.

20000140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000140 is an abundant number, since it is smaller than the sum of its proper divisors (23449700).

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

20000140 is a wasteful number, since it uses less digits than its factorization.

20000140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34521 (or 34519 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20000140 is about 4472.1516074480. The cubic root of 20000140 is about 271.4423950221.

Adding to 20000140 its reverse (4100002), we get a palindrome (24100142).

The spelling of 20000140 in words is "twenty million, one hundred forty", and thus it is an aban number.