20612140 has 24 divisors (see below), whose sum is σ = 45168480. Its totient is φ = 7886208.

The previous prime is 20612129. The next prime is 20612149. The reversal of 20612140 is 4121602.

It is not an unprimeable number, because it can be changed into a prime (20612149) 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, 21945 + ... + 22864.

It is an arithmetic number, because the mean of its divisors is an integer number (1882020).

Almost surely, 2^20612140 is an apocalyptic number.

20612140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20612140 is an abundant number, since it is smaller than the sum of its proper divisors (24556340).

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

20612140 is a wasteful number, since it uses less digits than its factorization.

20612140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44841 (or 44839 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20612140 is about 4540.0594709761. The cubic root of 20612140 is about 274.1833181047.

Adding to 20612140 its reverse (4121602), we get a palindrome (24733742).

The spelling of 20612140 in words is "twenty million, six hundred twelve thousand, one hundred forty".