21436034 has 8 divisors (see below), whose sum is σ = 32370300. Its totient is φ = 10645936.

The previous prime is 21436027. The next prime is 21436067. The reversal of 21436034 is 43063412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15171025 + 6265009 = 3895^2 + 2503^2 .

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

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35669 + ... + 36264.

Almost surely, 2^21436034 is an apocalyptic number.

21436034 is a deficient number, since it is larger than the sum of its proper divisors (10934266).

21436034 is a wasteful number, since it uses less digits than its factorization.

21436034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72084.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 21436034 is about 4629.9064785371. The cubic root of 21436034 is about 277.7888516237.

Adding to 21436034 its reverse (43063412), we get a palindrome (64499446).

The spelling of 21436034 in words is "twenty-one million, four hundred thirty-six thousand, thirty-four".