21011362436 has 24 divisors (see below), whose sum is σ = 37346974560. Its totient is φ = 10341839552.

The previous prime is 21011362397. The next prime is 21011362441. The reversal of 21011362436 is 63426311012.

It is a junction number, because it is equal to n+sod(n) for n = 21011362399 and 21011362408.

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, 49190 + ... + 210813.

It is an arithmetic number, because the mean of its divisors is an integer number (1556123940).

Almost surely, 2^21011362436 is an apocalyptic number.

It is an amenable number.

21011362436 is a deficient number, since it is larger than the sum of its proper divisors (16335612124).

21011362436 is a wasteful number, since it uses less digits than its factorization.

21011362436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260323 (or 260321 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 21011362436 its reverse (63426311012), we get a palindrome (84437673448).

The spelling of 21011362436 in words is "twenty-one billion, eleven million, three hundred sixty-two thousand, four hundred thirty-six".