20028476484 has 81 divisors (see below), whose sum is σ = 51348062493. Its totient is φ = 6582471264.

The previous prime is 20028476471. The next prime is 20028476513. The reversal of 20028476484 is 48467482002.

The square root of 20028476484 is 141522.

It is a perfect power (a square), and thus also a powerful number.

20028476484 is a `hidden beast` number, since 20 + 0 + 2 + 84 + 76 + 484 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18653550084 + 1374926400 = 136578^2 + 37080^2 .

It is a super-2 number, since 2×20028476484² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 87460482 + ... + 87460710.

Almost surely, 2^20028476484 is an apocalyptic number.

20028476484 is the 141522-nd square number.

It is an amenable number.

20028476484 is an abundant number, since it is smaller than the sum of its proper divisors (31319586009).

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

20028476484 is a wasteful number, since it uses less digits than its factorization.

20028476484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 20028476484 in words is "twenty billion, twenty-eight million, four hundred seventy-six thousand, four hundred eighty-four".