21160476 has 72 divisors (see below), whose sum is σ = 56236544. Its totient is φ = 6700320.

The previous prime is 21160457. The next prime is 21160501. The reversal of 21160476 is 67406112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74631 + ... + 74913.

Almost surely, 2^21160476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28118272).

21160476 is an abundant number, since it is smaller than the sum of its proper divisors (35076068).

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

21160476 is a wasteful number, since it uses less digits than its factorization.

21160476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21160476 is about 4600.0517388395. The cubic root of 21160476 is about 276.5933987693.

Adding to 21160476 its reverse (67406112), we get a palindrome (88566588).

The spelling of 21160476 in words is "twenty-one million, one hundred sixty thousand, four hundred seventy-six".