20600140 has 24 divisors (see below), whose sum is σ = 47193552. Its totient is φ = 7490880.

The previous prime is 20600137. The next prime is 20600149. The reversal of 20600140 is 4100602.

It is a self number, because there is not a number n which added to its sum of digits gives 20600140.

It is not an unprimeable number, because it can be changed into a prime (20600149) 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, 46599 + ... + 47038.

It is an arithmetic number, because the mean of its divisors is an integer number (1966398).

Almost surely, 2^20600140 is an apocalyptic number.

20600140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20600140 is an abundant number, since it is smaller than the sum of its proper divisors (26593412).

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

20600140 is a wasteful number, since it uses less digits than its factorization.

20600140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93657 (or 93655 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20600140 is about 4538.7377099806. The cubic root of 20600140 is about 274.1300996532.

Adding to 20600140 its reverse (4100602), we get a palindrome (24700742).

The spelling of 20600140 in words is "twenty million, six hundred thousand, one hundred forty".