20406078484 has 12 divisors (see below), whose sum is σ = 38957059008. Its totient is φ = 9275490200.

The previous prime is 20406078479. The next prime is 20406078499. The reversal of 20406078484 is 48487060402.

It is a self number, because there is not a number n which added to its sum of digits gives 20406078484.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231887212 + ... + 231887299.

It is an arithmetic number, because the mean of its divisors is an integer number (3246421584).

Almost surely, 2^20406078484 is an apocalyptic number.

It is an amenable number.

20406078484 is a deficient number, since it is larger than the sum of its proper divisors (18550980524).

20406078484 is a wasteful number, since it uses less digits than its factorization.

20406078484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463774526 (or 463774524 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 43.

The spelling of 20406078484 in words is "twenty billion, four hundred six million, seventy-eight thousand, four hundred eighty-four".