21011762336 has 24 divisors (see below), whose sum is σ = 41668864020. Its totient is φ = 10429193728.

The previous prime is 21011762327. The next prime is 21011762339. The reversal of 21011762336 is 63326711012.

It can be written as a sum of positive squares in 2 ways, for example, as 20748673936 + 263088400 = 144044^2 + 16220^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21011762339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392031 + ... + 2400798.

Almost surely, 2^21011762336 is an apocalyptic number.

It is an amenable number.

21011762336 is a deficient number, since it is larger than the sum of its proper divisors (20657101684).

21011762336 is a wasteful number, since it uses less digits than its factorization.

21011762336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792976 (or 4792968 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 21011762336 in words is "twenty-one billion, eleven million, seven hundred sixty-two thousand, three hundred thirty-six".