20495956 has 12 divisors (see below), whose sum is σ = 38627092. Its totient is φ = 9459648.

The previous prime is 20495887. The next prime is 20495963. The reversal of 20495956 is 65959402.

It can be written as a sum of positive squares in 2 ways, for example, as 13205956 + 7290000 = 3634^2 + 2700^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197025 + ... + 197128.

Almost surely, 2^20495956 is an apocalyptic number.

20495956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20495956 is a deficient number, since it is larger than the sum of its proper divisors (18131136).

20495956 is a wasteful number, since it uses less digits than its factorization.

20495956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394170 (or 394168 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 20495956 is about 4527.2459619508. The cubic root of 20495956 is about 273.6671860868.

The spelling of 20495956 in words is "twenty million, four hundred ninety-five thousand, nine hundred fifty-six".