20337481 has 2 divisors, whose sum is σ = 20337482. Its totient is φ = 20337480.

The previous prime is 20337469. The next prime is 20337509. The reversal of 20337481 is 18473302.

It is an a-pointer prime, because the next prime (20337509) can be obtained adding 20337481 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20331081 + 6400 = 4509^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 20337481 - 2⁹ = 20336969 is a prime.

It is a super-2 number, since 2×20337481² = 827226266850722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20337431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168740 + 10168741.

It is an arithmetic number, because the mean of its divisors is an integer number (10168741).

Almost surely, 2^20337481 is an apocalyptic number.

It is an amenable number.

20337481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20337481 is an equidigital number, since it uses as much as digits as its factorization.

20337481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20337481 is about 4509.7096358857. The cubic root of 20337481 is about 272.9600276021.

The spelling of 20337481 in words is "twenty million, three hundred thirty-seven thousand, four hundred eighty-one".