21094902 has 24 divisors (see below), whose sum is σ = 48111960. Its totient is φ = 6661440.

The previous prime is 21094873. The next prime is 21094903. The reversal of 21094902 is 20949012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21094903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30499 + ... + 31182.

It is an arithmetic number, because the mean of its divisors is an integer number (2004665).

Almost surely, 2^21094902 is an apocalyptic number.

21094902 is an abundant number, since it is smaller than the sum of its proper divisors (27017058).

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

21094902 is a wasteful number, since it uses less digits than its factorization.

21094902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61708 (or 61705 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 21094902 is about 4592.9186798810. The cubic root of 21094902 is about 276.3073922375.

The spelling of 21094902 in words is "twenty-one million, ninety-four thousand, nine hundred two".