20365133 has 8 divisors (see below), whose sum is σ = 22146552. Its totient is φ = 18648576.

The previous prime is 20365127. The next prime is 20365139. The reversal of 20365133 is 33156302.

It is an interprime number because it is at equal distance from previous prime (20365127) and next prime (20365139).

It can be written as a sum of positive squares in 4 ways, for example, as 11377129 + 8988004 = 3373^2 + 2998^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20365133 - 2⁴ = 20365117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20365099 and 20365108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365139) 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, 15560 + ... + 16817.

It is an arithmetic number, because the mean of its divisors is an integer number (2768319).

Almost surely, 2^20365133 is an apocalyptic number.

It is an amenable number.

20365133 is a deficient number, since it is larger than the sum of its proper divisors (1781419).

20365133 is a wasteful number, since it uses less digits than its factorization.

20365133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32431.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 20365133 is about 4512.7744237885. The cubic root of 20365133 is about 273.0836822543.

The spelling of 20365133 in words is "twenty million, three hundred sixty-five thousand, one hundred thirty-three".