20466437 has 2 divisors, whose sum is σ = 20466438. Its totient is φ = 20466436.

The previous prime is 20466377. The next prime is 20466461. The reversal of 20466437 is 73466402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19088161 + 1378276 = 4369^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 20466437 - 2¹⁸ = 20204293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20466497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233218 + 10233219.

It is an arithmetic number, because the mean of its divisors is an integer number (10233219).

Almost surely, 2^20466437 is an apocalyptic number.

It is an amenable number.

20466437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466437 is an equidigital number, since it uses as much as digits as its factorization.

20466437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 20466437 is about 4523.9846374629. The cubic root of 20466437 is about 273.5357412458.

The spelling of 20466437 in words is "twenty million, four hundred sixty-six thousand, four hundred thirty-seven".