20103956 has 6 divisors (see below), whose sum is σ = 35181930. Its totient is φ = 10051976.

The previous prime is 20103917. The next prime is 20103971. The reversal of 20103956 is 65930102.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 4343056 = 3970^2 + 2084^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512991 + ... + 2512998.

It is an arithmetic number, because the mean of its divisors is an integer number (5863655).

Almost surely, 2^20103956 is an apocalyptic number.

It is an amenable number.

20103956 is a deficient number, since it is larger than the sum of its proper divisors (15077974).

20103956 is a wasteful number, since it uses less digits than its factorization.

20103956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025993 (or 5025991 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20103956 is about 4483.7435252253. The cubic root of 20103956 is about 271.9112491588.

The spelling of 20103956 in words is "twenty million, one hundred three thousand, nine hundred fifty-six".