20103740 has 12 divisors (see below), whose sum is σ = 42217896. Its totient is φ = 8041488.

The previous prime is 20103739. The next prime is 20103751. The reversal of 20103740 is 4730102.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 502574 + ... + 502613.

It is an arithmetic number, because the mean of its divisors is an integer number (3518158).

Almost surely, 2^20103740 is an apocalyptic number.

20103740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20103740 is an abundant number, since it is smaller than the sum of its proper divisors (22114156).

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

20103740 is a wasteful number, since it uses less digits than its factorization.

20103740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005196 (or 1005194 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20103740 is about 4483.7194381451. The cubic root of 20103740 is about 271.9102753366.

Adding to 20103740 its reverse (4730102), we get a palindrome (24833842).

The spelling of 20103740 in words is "twenty million, one hundred three thousand, seven hundred forty".