140000020 has 24 divisors (see below), whose sum is σ = 295500744. Its totient is φ = 55714176.

The previous prime is 139999991. The next prime is 140000041. The reversal of 140000020 is 20000041.

It can be written as a sum of positive squares in 4 ways, for example, as 17322244 + 122677776 = 4162^2 + 11076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139999958 and 140000012.

It is a congruent number.

It is an unprimeable number.

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, 13827 + ... + 21706.

It is an arithmetic number, because the mean of its divisors is an integer number (12312531).

Almost surely, 2^140000020 is an apocalyptic number.

140000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140000020 is an abundant number, since it is smaller than the sum of its proper divisors (155500724).

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

140000020 is a wasteful number, since it uses less digits than its factorization.

140000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35739 (or 35737 counting only the distinct ones).

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

The square root of 140000020 is about 11832.1604113535. The cubic root of 140000020 is about 519.2494349113.

Adding to 140000020 its reverse (20000041), we get a palindrome (160000061).

The spelling of 140000020 in words is "one hundred forty million, twenty", and thus it is an aban number.