21401468 has 12 divisors (see below), whose sum is σ = 40857432. Its totient is φ = 9727920.

The previous prime is 21401461. The next prime is 21401473. The reversal of 21401468 is 86410412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243155 + ... + 243242.

It is an arithmetic number, because the mean of its divisors is an integer number (3404786).

Almost surely, 2^21401468 is an apocalyptic number.

It is an amenable number.

21401468 is a deficient number, since it is larger than the sum of its proper divisors (19455964).

21401468 is a wasteful number, since it uses less digits than its factorization.

21401468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486412 (or 486410 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 21401468 is about 4626.1720677035. The cubic root of 21401468 is about 277.6394580802.

The spelling of 21401468 in words is "twenty-one million, four hundred one thousand, four hundred sixty-eight".