21471110 has 16 divisors (see below), whose sum is σ = 39193632. Its totient is φ = 8467200.

The previous prime is 21471097. The next prime is 21471133. The reversal of 21471110 is 1117412.

It is a super-2 number, since 2×21471110² = 922017129264200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14411 + ... + 15830.

It is an arithmetic number, because the mean of its divisors is an integer number (2449602).

Almost surely, 2^21471110 is an apocalyptic number.

21471110 is a deficient number, since it is larger than the sum of its proper divisors (17722522).

21471110 is a wasteful number, since it uses less digits than its factorization.

21471110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30319.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 21471110 is about 4633.6929117066. The cubic root of 21471110 is about 277.9402852953.

Adding to 21471110 its reverse (1117412), we get a palindrome (22588522).

The spelling of 21471110 in words is "twenty-one million, four hundred seventy-one thousand, one hundred ten".