20763551 has 2 divisors, whose sum is σ = 20763552. Its totient is φ = 20763550.

The previous prime is 20763541. The next prime is 20763559. The reversal of 20763551 is 15536702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20763551 - 2⁶ = 20763487 is a prime.

It is a super-2 number, since 2×20763551² = 862250100259202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20763559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381775 + 10381776.

It is an arithmetic number, because the mean of its divisors is an integer number (10381776).

Almost surely, 2^20763551 is an apocalyptic number.

20763551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763551 is an equidigital number, since it uses as much as digits as its factorization.

20763551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 20763551 is about 4556.7039622956. The cubic root of 20763551 is about 274.8530388327.

The spelling of 20763551 in words is "twenty million, seven hundred sixty-three thousand, five hundred fifty-one".