20070140 has 12 divisors (see below), whose sum is σ = 42147336. Its totient is φ = 8028048.

The previous prime is 20070139. The next prime is 20070143. The reversal of 20070140 is 4107002.

It is a happy number.

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 in 3 ways as a sum of consecutive naturals, for example, 501734 + ... + 501773.

It is an arithmetic number, because the mean of its divisors is an integer number (3512278).

Almost surely, 2^20070140 is an apocalyptic number.

20070140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20070140 is an abundant number, since it is smaller than the sum of its proper divisors (22077196).

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

20070140 is a wasteful number, since it uses less digits than its factorization.

20070140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003516 (or 1003514 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20070140 is about 4479.9709820489. The cubic root of 20070140 is about 271.7587068582.

Adding to 20070140 its reverse (4107002), we get a palindrome (24177142).

The spelling of 20070140 in words is "twenty million, seventy thousand, one hundred forty".