21754463 has 2 divisors, whose sum is σ = 21754464. Its totient is φ = 21754462.

The previous prime is 21754459. The next prime is 21754489. The reversal of 21754463 is 36445712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21754463 - 2² = 21754459 is a prime.

It is a super-3 number, since 3×21754463³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21754423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10877231 + 10877232.

It is an arithmetic number, because the mean of its divisors is an integer number (10877232).

Almost surely, 2^21754463 is an apocalyptic number.

21754463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21754463 is an equidigital number, since it uses as much as digits as its factorization.

21754463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 21754463 is about 4664.1679858256. The cubic root of 21754463 is about 279.1575999234.

The spelling of 21754463 in words is "twenty-one million, seven hundred fifty-four thousand, four hundred sixty-three".