21514154 has 8 divisors (see below), whose sum is σ = 33674400. Its totient is φ = 10289356.

The previous prime is 21514153. The next prime is 21514159. The reversal of 21514154 is 45141512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (21514153) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 233804 + ... + 233895.

It is an arithmetic number, because the mean of its divisors is an integer number (4209300).

Almost surely, 2^21514154 is an apocalyptic number.

21514154 is a deficient number, since it is larger than the sum of its proper divisors (12160246).

21514154 is a wasteful number, since it uses less digits than its factorization.

21514154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467724.

The product of its digits is 800, while the sum is 23.

The square root of 21514154 is about 4638.3352617076. The cubic root of 21514154 is about 278.1258940172.

Adding to 21514154 its reverse (45141512), we get a palindrome (66655666).

The spelling of 21514154 in words is "twenty-one million, five hundred fourteen thousand, one hundred fifty-four".