21074356 has 24 divisors (see below), whose sum is σ = 39553920. Its totient is φ = 9789312.

The previous prime is 21074353. The next prime is 21074359. The reversal of 21074356 is 65347012.

It is an interprime number because it is at equal distance from previous prime (21074353) and next prime (21074359).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21074353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3411 + ... + 7333.

It is an arithmetic number, because the mean of its divisors is an integer number (1648080).

Almost surely, 2^21074356 is an apocalyptic number.

It is an amenable number.

21074356 is a deficient number, since it is larger than the sum of its proper divisors (18479564).

21074356 is a wasteful number, since it uses less digits than its factorization.

21074356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21074356 is about 4590.6814308989. The cubic root of 21074356 is about 276.2176571951.

The spelling of 21074356 in words is "twenty-one million, seventy-four thousand, three hundred fifty-six".