21827373552 has 30 divisors (see below), whose sum is σ = 61086330552. Its totient is φ = 7275791136.

The previous prime is 21827373523. The next prime is 21827373559. The reversal of 21827373552 is 25537372812.

21827373552 is a `hidden beast` number, since 2 + 1 + 8 + 27 + 3 + 73 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21827373498 and 21827373507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21827373559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75789348 + ... + 75789635.

Almost surely, 2^21827373552 is an apocalyptic number.

It is an amenable number.

21827373552 is an abundant number, since it is smaller than the sum of its proper divisors (39258957000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21827373552 is a wasteful number, since it uses less digits than its factorization.

21827373552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151578997 (or 151578988 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 21827373552 in words is "twenty-one billion, eight hundred twenty-seven million, three hundred seventy-three thousand, five hundred fifty-two".