20478532242 has 16 divisors (see below), whose sum is σ = 46808073792. Its totient is φ = 5851009200.

The previous prime is 20478532199. The next prime is 20478532279. The reversal of 20478532242 is 24223587402.

It is a self number, because there is not a number n which added to its sum of digits gives 20478532242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243792009 + ... + 243792092.

It is an arithmetic number, because the mean of its divisors is an integer number (2925504612).

Almost surely, 2^20478532242 is an apocalyptic number.

20478532242 is an abundant number, since it is smaller than the sum of its proper divisors (26329541550).

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

20478532242 is a wasteful number, since it uses less digits than its factorization.

20478532242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487584113.

The product of its (nonzero) digits is 215040, while the sum is 39.

The spelling of 20478532242 in words is "twenty billion, four hundred seventy-eight million, five hundred thirty-two thousand, two hundred forty-two".