21237074226 has 48 divisors (see below), whose sum is σ = 46340572824. Its totient is φ = 7028911872.

The previous prime is 21237074171. The next prime is 21237074321. The reversal of 21237074226 is 62247073212.

It is a happy number.

21237074226 is a `hidden beast` number, since 212 + 370 + 74 + 2 + 2 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17489798001 + 3747276225 = 132249^2 + 61215^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1453630 + ... + 1468166.

Almost surely, 2^21237074226 is an apocalyptic number.

21237074226 is an abundant number, since it is smaller than the sum of its proper divisors (25103498598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21237074226 is a wasteful number, since it uses less digits than its factorization.

21237074226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15115 (or 15112 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 21237074226 in words is "twenty-one billion, two hundred thirty-seven million, seventy-four thousand, two hundred twenty-six".