21060183772 has 48 divisors (see below), whose sum is σ = 39671069760. Its totient is φ = 9756882432.

The previous prime is 21060183769. The next prime is 21060183803. The reversal of 21060183772 is 27738106012.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766008 + ... + 793024.

It is an arithmetic number, because the mean of its divisors is an integer number (826480620).

Almost surely, 2^21060183772 is an apocalyptic number.

It is an amenable number.

21060183772 is a deficient number, since it is larger than the sum of its proper divisors (18610885988).

21060183772 is a wasteful number, since it uses less digits than its factorization.

21060183772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27310 (or 27308 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

Adding to 21060183772 its reverse (27738106012), we get a palindrome (48798289784).

The spelling of 21060183772 in words is "twenty-one billion, sixty million, one hundred eighty-three thousand, seven hundred seventy-two".