20284756146 has 36 divisors (see below), whose sum is σ = 44682760746. Its totient is φ = 6650717760.

The previous prime is 20284756127. The next prime is 20284756153. The reversal of 20284756146 is 64165748202.

20284756146 is a `hidden beast` number, since 2 + 0 + 2 + 8 + 47 + 561 + 46 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5604768225 + 14679987921 = 74865^2 + 121161^2 .

It is a super-2 number, since 2×20284756146² (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 17 ways as a sum of consecutive naturals, for example, 84451 + ... + 218406.

Almost surely, 2^20284756146 is an apocalyptic number.

20284756146 is an abundant number, since it is smaller than the sum of its proper divisors (24398004600).

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

20284756146 is a wasteful number, since it uses less digits than its factorization.

20284756146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302987 (or 302923 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20284756146 in words is "twenty billion, two hundred eighty-four million, seven hundred fifty-six thousand, one hundred forty-six".