21737775104 has 28 divisors (see below), whose sum is σ = 43472913054. Its totient is φ = 10868883456.

The previous prime is 21737775089. The next prime is 21737775107. The reversal of 21737775104 is 40157773712.

It can be written as a sum of positive squares in only one way, i.e., 21386137600 + 351637504 = 146240^2 + 18752^2 .

It is not an unprimeable number, because it can be changed into a prime (21737775107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318577 + ... + 1334960.

Almost surely, 2^21737775104 is an apocalyptic number.

It is an amenable number.

21737775104 is a deficient number, since it is larger than the sum of its proper divisors (21735137950).

21737775104 is an frugal number, since it uses more digits than its factorization.

21737775104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653563 (or 2653539 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 44.

The spelling of 21737775104 in words is "twenty-one billion, seven hundred thirty-seven million, seven hundred seventy-five thousand, one hundred four".