21179002 has 8 divisors (see below), whose sum is σ = 34212276. Its totient is φ = 9774912.

The previous prime is 21178987. The next prime is 21179003. The reversal of 21179002 is 20097112.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 9801 = 4601^2 + 99^2 .

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 (21179003) 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, 407263 + ... + 407314.

Almost surely, 2^21179002 is an apocalyptic number.

21179002 is a deficient number, since it is larger than the sum of its proper divisors (13033274).

21179002 is a wasteful number, since it uses less digits than its factorization.

21179002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814592.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 21179002 is about 4602.0649712928. The cubic root of 21179002 is about 276.6740944120.

The spelling of 21179002 in words is "twenty-one million, one hundred seventy-nine thousand, two".