21369914 has 8 divisors (see below), whose sum is σ = 32146740. Its totient is φ = 10654336.

The previous prime is 21369911. The next prime is 21369917. The reversal of 21369914 is 41996312.

It is an interprime number because it is at equal distance from previous prime (21369911) and next prime (21369917).

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 366025 = 4583^2 + 605^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21369911) 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, 14429 + ... + 15840.

Almost surely, 2^21369914 is an apocalyptic number.

21369914 is a deficient number, since it is larger than the sum of its proper divisors (10776826).

21369914 is a wasteful number, since it uses less digits than its factorization.

21369914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30624.

The product of its digits is 11664, while the sum is 35.

The square root of 21369914 is about 4622.7604307383. The cubic root of 21369914 is about 277.5029418296.

The spelling of 21369914 in words is "twenty-one million, three hundred sixty-nine thousand, nine hundred fourteen".