20763731 has 2 divisors, whose sum is σ = 20763732. Its totient is φ = 20763730.

The previous prime is 20763727. The next prime is 20763761. The reversal of 20763731 is 13736702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20763731 - 2² = 20763727 is a prime.

It is a super-2 number, since 2×20763731² = 862265050080722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20763694 and 20763703.

It is not a weakly prime, because it can be changed into another prime (20763761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381865 + 10381866.

It is an arithmetic number, because the mean of its divisors is an integer number (10381866).

Almost surely, 2^20763731 is an apocalyptic number.

20763731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763731 is an equidigital number, since it uses as much as digits as its factorization.

20763731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 20763731 is about 4556.7237133713. The cubic root of 20763731 is about 274.8538330675.

The spelling of 20763731 in words is "twenty million, seven hundred sixty-three thousand, seven hundred thirty-one".