20195633 has 6 divisors (see below), whose sum is σ = 21112434. Its totient is φ = 19317056.

The previous prime is 20195621. The next prime is 20195647. The reversal of 20195633 is 33659102.

It can be written as a sum of positive squares in only one way, i.e., 12061729 + 8133904 = 3473^2 + 2852^2 .

It is not a de Polignac number, because 20195633 - 2¹² = 20191537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20195596 and 20195605.

It is not an unprimeable number, because it can be changed into a prime (20195603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18560 + ... + 19617.

It is an arithmetic number, because the mean of its divisors is an integer number (3518739).

Almost surely, 2^20195633 is an apocalyptic number.

20195633 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20195633 is a deficient number, since it is larger than the sum of its proper divisors (916801).

20195633 is an equidigital number, since it uses as much as digits as its factorization.

20195633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38223 (or 38200 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 20195633 is about 4493.9551622151. The cubic root of 20195633 is about 272.3239409279.

The spelling of 20195633 in words is "twenty million, one hundred ninety-five thousand, six hundred thirty-three".