20413737 has 6 divisors (see below), whose sum is σ = 29486522. Its totient is φ = 13609152.

The previous prime is 20413703. The next prime is 20413739. The reversal of 20413737 is 73731402.

It can be written as a sum of positive squares in only one way, i.e., 12257001 + 8156736 = 3501^2 + 2856^2 .

It is not a de Polignac number, because 20413737 - 2¹¹ = 20411689 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 20413737.

It is not an unprimeable number, because it can be changed into a prime (20413739) 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, 1134088 + ... + 1134105.

Almost surely, 2^20413737 is an apocalyptic number.

It is an amenable number.

20413737 is a deficient number, since it is larger than the sum of its proper divisors (9072785).

20413737 is a wasteful number, since it uses less digits than its factorization.

20413737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268199 (or 2268196 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20413737 is about 4518.1563717959. The cubic root of 20413737 is about 273.3007593874.

It can be divided in two parts, 2041 and 3737, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 20413737 in words is "twenty million, four hundred thirteen thousand, seven hundred thirty-seven".