21514438 has 16 divisors (see below), whose sum is σ = 35956224. Its totient is φ = 9570760.

The previous prime is 21514429. The next prime is 21514439. The reversal of 21514438 is 83441512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9370 + ... + 11437.

It is an arithmetic number, because the mean of its divisors is an integer number (2247264).

Almost surely, 2^21514438 is an apocalyptic number.

21514438 is a deficient number, since it is larger than the sum of its proper divisors (14441786).

21514438 is a wasteful number, since it uses less digits than its factorization.

21514438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20867.

The product of its digits is 3840, while the sum is 28.

The square root of 21514438 is about 4638.3658760387. The cubic root of 21514438 is about 278.1271178225.

It can be divided in two parts, 21514 and 438, that added together give a cube (21952 = 28³).

The spelling of 21514438 in words is "twenty-one million, five hundred fourteen thousand, four hundred thirty-eight".