20536783 has 2 divisors, whose sum is σ = 20536784. Its totient is φ = 20536782.

The previous prime is 20536781. The next prime is 20536823. The reversal of 20536783 is 38763502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20536783 - 2¹ = 20536781 is a prime.

Together with 20536781, 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 (20536781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268391 + 10268392.

It is an arithmetic number, because the mean of its divisors is an integer number (10268392).

Almost surely, 2^20536783 is an apocalyptic number.

20536783 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536783 is an equidigital number, since it uses as much as digits as its factorization.

20536783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20536783 is about 4531.7527514197. The cubic root of 20536783 is about 273.8487763754.

It can be divided in two parts, 2053 and 6783, that added together give a square (8836 = 94²).

The spelling of 20536783 in words is "twenty million, five hundred thirty-six thousand, seven hundred eighty-three".