20420461084 has 12 divisors (see below), whose sum is σ = 35736989400. Its totient is φ = 10209892688.

The previous prime is 20420461069. The next prime is 20420461091. The reversal of 20420461084 is 48016402402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92922 + ... + 222430.

It is an arithmetic number, because the mean of its divisors is an integer number (2978082450).

Almost surely, 2^20420461084 is an apocalyptic number.

It is an amenable number.

20420461084 is a deficient number, since it is larger than the sum of its proper divisors (15316528316).

20420461084 is a wasteful number, since it uses less digits than its factorization.

20420461084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168932 (or 168930 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 20420461084 its reverse (48016402402), we get a palindrome (68436863486).

The spelling of 20420461084 in words is "twenty billion, four hundred twenty million, four hundred sixty-one thousand, eighty-four".