20763487 has 2 divisors, whose sum is σ = 20763488. Its totient is φ = 20763486.

The previous prime is 20763437. The next prime is 20763493. The reversal of 20763487 is 78436702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20763487 - 2⁷ = 20763359 is a prime.

It is a super-2 number, since 2×20763487² = 862244784798338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20763437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381743 + 10381744.

It is an arithmetic number, because the mean of its divisors is an integer number (10381744).

Almost surely, 2^20763487 is an apocalyptic number.

20763487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763487 is an equidigital number, since it uses as much as digits as its factorization.

20763487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20763487 is about 4556.6969396702. The cubic root of 20763487 is about 274.8527564370.

The spelling of 20763487 in words is "twenty million, seven hundred sixty-three thousand, four hundred eighty-seven".