21770332448 has 18 divisors (see below), whose sum is σ = 42861985299. Its totient is φ = 10884748896.

The previous prime is 21770332433. The next prime is 21770332477. The reversal of 21770332448 is 84423307712.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10885166224 + 10885166224 = 104332^2 + 104332^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104332.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 821615 + ... + 847697.

Almost surely, 2^21770332448 is an apocalyptic number.

It is an amenable number.

21770332448 is a deficient number, since it is larger than the sum of its proper divisors (21091652851).

21770332448 is an frugal number, since it uses more digits than its factorization.

21770332448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52176 (or 26085 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 21770332448 in words is "twenty-one billion, seven hundred seventy million, three hundred thirty-two thousand, four hundred forty-eight".