20632693 has 2 divisors, whose sum is σ = 20632694. Its totient is φ = 20632692.

The previous prime is 20632691. The next prime is 20632709. The reversal of 20632693 is 39623602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 400689 = 4498^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 20632693 - 2¹ = 20632691 is a prime.

Together with 20632691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20632691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316346 + 10316347.

It is an arithmetic number, because the mean of its divisors is an integer number (10316347).

Almost surely, 2^20632693 is an apocalyptic number.

It is an amenable number.

20632693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632693 is an equidigital number, since it uses as much as digits as its factorization.

20632693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 20632693 is about 4542.3224236067. The cubic root of 20632693 is about 274.2744200433.

The spelling of 20632693 in words is "twenty million, six hundred thirty-two thousand, six hundred ninety-three".