21419463 has 16 divisors (see below), whose sum is σ = 32094720. Its totient is φ = 12607584.

The previous prime is 21419459. The next prime is 21419467. The reversal of 21419463 is 36491412.

It is an interprime number because it is at equal distance from previous prime (21419459) and next prime (21419467).

It is not a de Polignac number, because 21419463 - 2² = 21419459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21419463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21419467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11043 + ... + 12836.

It is an arithmetic number, because the mean of its divisors is an integer number (2005920).

Almost surely, 2^21419463 is an apocalyptic number.

21419463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21419463 is a deficient number, since it is larger than the sum of its proper divisors (10675257).

21419463 is a wasteful number, since it uses less digits than its factorization.

21419463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23918.

The product of its digits is 5184, while the sum is 30.

The square root of 21419463 is about 4628.1165715656. The cubic root of 21419463 is about 277.7172521581.

The spelling of 21419463 in words is "twenty-one million, four hundred nineteen thousand, four hundred sixty-three".