21034662 has 32 divisors (see below), whose sum is σ = 46877184. Its totient is φ = 6237600.

The previous prime is 21034613. The next prime is 21034667. The reversal of 21034662 is 26643012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034667) 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, 289 + ... + 6492.

It is an arithmetic number, because the mean of its divisors is an integer number (1464912).

Almost surely, 2^21034662 is an apocalyptic number.

21034662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21034662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23438592).

21034662 is an abundant number, since it is smaller than the sum of its proper divisors (25842522).

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

21034662 is a wasteful number, since it uses less digits than its factorization.

21034662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844.

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

The square root of 21034662 is about 4586.3560699100. The cubic root of 21034662 is about 276.0441275800.

Adding to 21034662 its reverse (26643012), we get a palindrome (47677674).

It can be divided in two parts, 210 and 34662, that multiplied together give a triangular number (7279020 = T₃₈₁₅).

The spelling of 21034662 in words is "twenty-one million, thirty-four thousand, six hundred sixty-two".