21062634 has 16 divisors (see below), whose sum is σ = 42221088. Its totient is φ = 7004912.

The previous prime is 21062633. The next prime is 21062663. The reversal of 21062634 is 43626012.

It is not an unprimeable number, because it can be changed into a prime (21062633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957 + ... + 6560.

It is an arithmetic number, because the mean of its divisors is an integer number (2638818).

Almost surely, 2^21062634 is an apocalyptic number.

21062634 is an abundant number, since it is smaller than the sum of its proper divisors (21158454).

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

21062634 is a wasteful number, since it uses less digits than its factorization.

21062634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21062634 is about 4589.4045365385. The cubic root of 21062634 is about 276.1664350070.

Adding to 21062634 its reverse (43626012), we get a palindrome (64688646).

The spelling of 21062634 in words is "twenty-one million, sixty-two thousand, six hundred thirty-four".