21008348 has 6 divisors (see below), whose sum is σ = 36764616. Its totient is φ = 10504172.

The previous prime is 21008347. The next prime is 21008353. The reversal of 21008348 is 84380012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21008347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626040 + ... + 2626047.

It is an arithmetic number, because the mean of its divisors is an integer number (6127436).

Almost surely, 2^21008348 is an apocalyptic number.

It is an amenable number.

21008348 is a deficient number, since it is larger than the sum of its proper divisors (15756268).

21008348 is a wasteful number, since it uses less digits than its factorization.

21008348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252091 (or 5252089 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 21008348 is about 4583.4864459274. The cubic root of 21008348 is about 275.9289707299.

The spelling of 21008348 in words is "twenty-one million, eight thousand, three hundred forty-eight".