20370133 has 6 divisors (see below), whose sum is σ = 23695926. Its totient is φ = 17460072.

The previous prime is 20370127. The next prime is 20370137. The reversal of 20370133 is 33107302.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 362404 = 4473^2 + 602^2 .

It is not a de Polignac number, because 20370133 - 2¹³ = 20361941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20370133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20370137) 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, 207810 + ... + 207907.

It is an arithmetic number, because the mean of its divisors is an integer number (3949321).

Almost surely, 2^20370133 is an apocalyptic number.

It is an amenable number.

20370133 is a deficient number, since it is larger than the sum of its proper divisors (3325793).

20370133 is an equidigital number, since it uses as much as digits as its factorization.

20370133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415731 (or 415724 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20370133 is about 4513.3283727201. The cubic root of 20370133 is about 273.1060293819.

Adding to 20370133 its reverse (33107302), we get a palindrome (53477435).

It can be divided in two parts, 20370 and 133, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20370133 in words is "twenty million, three hundred seventy thousand, one hundred thirty-three".