20983037 has 4 divisors (see below), whose sum is σ = 21706620. Its totient is φ = 20259456.

The previous prime is 20983031. The next prime is 20983043. The reversal of 20983037 is 73038902.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20983031) and next prime (20983043).

It can be written as a sum of positive squares in 2 ways, for example, as 14485636 + 6497401 = 3806^2 + 2549^2 .

It is a cyclic number.

It is not a de Polignac number, because 20983037 - 2¹² = 20978941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20982994 and 20983012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20983031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361748 + ... + 361805.

It is an arithmetic number, because the mean of its divisors is an integer number (5426655).

Almost surely, 2^20983037 is an apocalyptic number.

It is an amenable number.

20983037 is a deficient number, since it is larger than the sum of its proper divisors (723583).

20983037 is an equidigital number, since it uses as much as digits as its factorization.

20983037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723582.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20983037 is about 4580.7245060143. The cubic root of 20983037 is about 275.8181124993.

The spelling of 20983037 in words is "twenty million, nine hundred eighty-three thousand, thirty-seven".