21398114 has 16 divisors (see below), whose sum is σ = 33835320. Its totient is φ = 10133760.

The previous prime is 21398107. The next prime is 21398131. The reversal of 21398114 is 41189312.

It can be written as a sum of positive squares in 4 ways, for example, as 21114025 + 284089 = 4595^2 + 533^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407 + ... + 6554.

Almost surely, 2^21398114 is an apocalyptic number.

21398114 is a deficient number, since it is larger than the sum of its proper divisors (12437206).

21398114 is a wasteful number, since it uses less digits than its factorization.

21398114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7045.

The product of its digits is 1728, while the sum is 29.

The square root of 21398114 is about 4625.8095507705. The cubic root of 21398114 is about 277.6249536018.

It can be divided in two parts, 21398 and 114, that added together give a palindrome (21512).

The spelling of 21398114 in words is "twenty-one million, three hundred ninety-eight thousand, one hundred fourteen".