21463010 has 32 divisors (see below), whose sum is σ = 41150592. Its totient is φ = 8032000.

The previous prime is 21463009. The next prime is 21463019. The reversal of 21463010 is 1036412.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21463010.

It is not an unprimeable number, because it can be changed into a prime (21463019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42419 + ... + 42921.

It is an arithmetic number, because the mean of its divisors is an integer number (1285956).

Almost surely, 2^21463010 is an apocalyptic number.

21463010 is a deficient number, since it is larger than the sum of its proper divisors (19687582).

21463010 is a wasteful number, since it uses less digits than its factorization.

21463010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21463010 is about 4632.8187963701. The cubic root of 21463010 is about 277.9053298059.

Adding to 21463010 its reverse (1036412), we get a palindrome (22499422).

The spelling of 21463010 in words is "twenty-one million, four hundred sixty-three thousand, ten".