20733487 has 2 divisors, whose sum is σ = 20733488. Its totient is φ = 20733486.

The previous prime is 20733481. The next prime is 20733527. The reversal of 20733487 is 78433702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20733487 - 2⁷ = 20733359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20733481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366743 + 10366744.

It is an arithmetic number, because the mean of its divisors is an integer number (10366744).

Almost surely, 2^20733487 is an apocalyptic number.

20733487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20733487 is an equidigital number, since it uses as much as digits as its factorization.

20733487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20733487 is about 4553.4038915958. The cubic root of 20733487 is about 274.7203195125.

The spelling of 20733487 in words is "twenty million, seven hundred thirty-three thousand, four hundred eighty-seven".