21327470 has 32 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 8176000.

The previous prime is 21327451. The next prime is 21327511. The reversal of 21327470 is 7472312.

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, 72644 + ... + 72936.

It is an arithmetic number, because the mean of its divisors is an integer number (1250235).

Almost surely, 2^21327470 is an apocalyptic number.

21327470 is a deficient number, since it is larger than the sum of its proper divisors (18680050).

21327470 is a wasteful number, since it uses less digits than its factorization.

21327470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21327470 is about 4618.1673854463. The cubic root of 21327470 is about 277.3190986104.

Adding to 21327470 its reverse (7472312), we get a palindrome (28799782).

The spelling of 21327470 in words is "twenty-one million, three hundred twenty-seven thousand, four hundred seventy".