20404533546 has 12 divisors (see below), whose sum is σ = 44209822722. Its totient is φ = 6801511176.

The previous prime is 20404533533. The next prime is 20404533631. The reversal of 20404533546 is 64533540402.

20404533546 is a `hidden beast` number, since 2 + 0 + 40 + 45 + 33 + 546 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15095808225 + 5308725321 = 122865^2 + 72861^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20404533546.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566792581 + ... + 566792616.

Almost surely, 2^20404533546 is an apocalyptic number.

20404533546 is an abundant number, since it is smaller than the sum of its proper divisors (23805289176).

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

20404533546 is a wasteful number, since it uses less digits than its factorization.

20404533546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133585205 (or 1133585202 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 20404533546 in words is "twenty billion, four hundred four million, five hundred thirty-three thousand, five hundred forty-six".