21230265274 has 4 divisors (see below), whose sum is σ = 31845397914. Its totient is φ = 10615132636.

The previous prime is 21230265269. The next prime is 21230265311. The reversal of 21230265274 is 47256203212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20020269049 + 1209996225 = 141493^2 + 34785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307566317 + ... + 5307566320.

Almost surely, 2^21230265274 is an apocalyptic number.

21230265274 is a deficient number, since it is larger than the sum of its proper divisors (10615132640).

21230265274 is a wasteful number, since it uses less digits than its factorization.

21230265274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10615132639.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 21230265274 its reverse (47256203212), we get a palindrome (68486468486).

The spelling of 21230265274 in words is "twenty-one billion, two hundred thirty million, two hundred sixty-five thousand, two hundred seventy-four".