21010132 has 48 divisors (see below), whose sum is σ = 45101952. Its totient is φ = 8426880.

The previous prime is 21010127. The next prime is 21010153. The reversal of 21010132 is 23101012.

It is a super-3 number, since 3×21010132³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12358 + ... + 13954.

It is an arithmetic number, because the mean of its divisors is an integer number (939624).

Almost surely, 2^21010132 is an apocalyptic number.

21010132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21010132 is an abundant number, since it is smaller than the sum of its proper divisors (24091820).

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

21010132 is a wasteful number, since it uses less digits than its factorization.

21010132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 21010132 is about 4583.6810534766. The cubic root of 21010132 is about 275.9367810117.

Adding to 21010132 its reverse (23101012), we get a palindrome (44111144).

The spelling of 21010132 in words is "twenty-one million, ten thousand, one hundred thirty-two".