21554080552 has 32 divisors (see below), whose sum is σ = 40952194920. Its totient is φ = 10634158080.

The previous prime is 21554080543. The next prime is 21554080571. The reversal of 21554080552 is 25508045512.

It can be written as a sum of positive squares in 4 ways, for example, as 20410693956 + 1143386596 = 142866^2 + 33814^2 .

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, 220302 + ... + 302722.

Almost surely, 2^21554080552 is an apocalyptic number.

It is an amenable number.

21554080552 is a deficient number, since it is larger than the sum of its proper divisors (19398114368).

21554080552 is a wasteful number, since it uses less digits than its factorization.

21554080552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82861 (or 82857 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

The spelling of 21554080552 in words is "twenty-one billion, five hundred fifty-four million, eighty thousand, five hundred fifty-two".