21494682 has 72 divisors (see below), whose sum is σ = 52284960. Its totient is φ = 6375600.

The previous prime is 21494677. The next prime is 21494689. The reversal of 21494682 is 28649412.

It is a super-2 number, since 2×21494682² = 924042708562248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21494689) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 154569 + ... + 154707.

It is an arithmetic number, because the mean of its divisors is an integer number (726180).

Almost surely, 2^21494682 is an apocalyptic number.

21494682 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 21494682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26142480).

21494682 is an abundant number, since it is smaller than the sum of its proper divisors (30790278).

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

21494682 is a wasteful number, since it uses less digits than its factorization.

21494682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 226 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 21494682 is about 4636.2357575947. The cubic root of 21494682 is about 278.0419600933.

The spelling of 21494682 in words is "twenty-one million, four hundred ninety-four thousand, six hundred eighty-two".