21237002 has 16 divisors (see below), whose sum is σ = 32416200. Its totient is φ = 10433280.

The previous prime is 21236989. The next prime is 21237011. The reversal of 21237002 is 20073212.

It can be written as a sum of positive squares in 4 ways, for example, as 17884441 + 3352561 = 4229^2 + 1831^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40502 + ... + 41022.

Almost surely, 2^21237002 is an apocalyptic number.

21237002 is a deficient number, since it is larger than the sum of its proper divisors (11179198).

21237002 is a wasteful number, since it uses less digits than its factorization.

21237002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 21237002 is about 4608.3621819471. The cubic root of 21237002 is about 276.9264272189.

The spelling of 21237002 in words is "twenty-one million, two hundred thirty-seven thousand, two".