21356002 has 8 divisors (see below), whose sum is σ = 32058576. Its totient is φ = 10669812.

The previous prime is 21355987. The next prime is 21356003. The reversal of 21356002 is 20065312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21356003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28 + ... + 6535.

It is an arithmetic number, because the mean of its divisors is an integer number (4007322).

Almost surely, 2^21356002 is an apocalyptic number.

21356002 is a deficient number, since it is larger than the sum of its proper divisors (10702574).

21356002 is a wasteful number, since it uses less digits than its factorization.

21356002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21356002 is about 4621.2554571242. The cubic root of 21356002 is about 277.4427098138.

The spelling of 21356002 in words is "twenty-one million, three hundred fifty-six thousand, two".