21514434 has 32 divisors (see below), whose sum is σ = 44888064. Its totient is φ = 6866640.

The previous prime is 21514429. The next prime is 21514439. The reversal of 21514434 is 43441512.

It is an interprime number because it is at equal distance from previous prime (21514429) and next prime (21514439).

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 15 ways as a sum of consecutive naturals, for example, 18597 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (1402752).

Almost surely, 2^21514434 is an apocalyptic number.

21514434 is an abundant number, since it is smaller than the sum of its proper divisors (23373630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21514434 is a wasteful number, since it uses less digits than its factorization.

21514434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its digits is 1920, while the sum is 24.

The square root of 21514434 is about 4638.3654448523. The cubic root of 21514434 is about 278.1271005859.

Adding to 21514434 its reverse (43441512), we get a palindrome (64955946).

The spelling of 21514434 in words is "twenty-one million, five hundred fourteen thousand, four hundred thirty-four".