21141470 has 32 divisors (see below), whose sum is σ = 44236800. Its totient is φ = 7124256.

The previous prime is 21141451. The next prime is 21141481. The reversal of 21141470 is 7414112.

It is a Curzon number.

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, 1571 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (1382400).

Almost surely, 2^21141470 is an apocalyptic number.

21141470 is an abundant number, since it is smaller than the sum of its proper divisors (23095330).

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

21141470 is a wasteful number, since it uses less digits than its factorization.

21141470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 21141470 is about 4597.9854284241. The cubic root of 21141470 is about 276.5105633797.

Adding to 21141470 its reverse (7414112), we get a palindrome (28555582).

The spelling of 21141470 in words is "twenty-one million, one hundred forty-one thousand, four hundred seventy".