21414012 has 24 divisors (see below), whose sum is σ = 52139136. Its totient is φ = 6827568.

The previous prime is 21413993. The next prime is 21414037. The reversal of 21414012 is 21041412.

It is a super-2 number, since 2×21414012² = 917119819872288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21413982 and 21414000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38518 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (2172464).

Almost surely, 2^21414012 is an apocalyptic number.

It is an amenable number.

21414012 is an abundant number, since it is smaller than the sum of its proper divisors (30725124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21414012 is a wasteful number, since it uses less digits than its factorization.

21414012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77617 (or 77615 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21414012 is about 4627.5276336290. The cubic root of 21414012 is about 277.6936915740.

Adding to 21414012 its reverse (21041412), we get a palindrome (42455424).

The spelling of 21414012 in words is "twenty-one million, four hundred fourteen thousand, twelve".