21061062 has 48 divisors (see below), whose sum is σ = 52717392. Its totient is φ = 6005760.

The previous prime is 21061057. The next prime is 21061069. The reversal of 21061062 is 26016012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21061069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238 + ... + 6494.

It is an arithmetic number, because the mean of its divisors is an integer number (1098279).

Almost surely, 2^21061062 is an apocalyptic number.

21061062 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 21061062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26358696).

21061062 is an abundant number, since it is smaller than the sum of its proper divisors (31656330).

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

21061062 is a wasteful number, since it uses less digits than its factorization.

21061062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293 (or 6290 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21061062 is about 4589.2332692946. The cubic root of 21061062 is about 276.1595643178.

Adding to 21061062 its reverse (26016012), we get a palindrome (47077074).

The spelling of 21061062 in words is "twenty-one million, sixty-one thousand, sixty-two".