21263102 has 16 divisors (see below), whose sum is σ = 36741120. Its totient is φ = 9040248.

The previous prime is 21263093. The next prime is 21263149. The reversal of 21263102 is 20136212.

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, 4202 + ... + 7757.

It is an arithmetic number, because the mean of its divisors is an integer number (2296320).

Almost surely, 2^21263102 is an apocalyptic number.

21263102 is a deficient number, since it is larger than the sum of its proper divisors (15478018).

21263102 is a wasteful number, since it uses less digits than its factorization.

21263102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12095.

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

The square root of 21263102 is about 4611.1931210913. The cubic root of 21263102 is about 277.0398271049.

Adding to 21263102 its reverse (20136212), we get a palindrome (41399314).

The spelling of 21263102 in words is "twenty-one million, two hundred sixty-three thousand, one hundred two".