20105427204 has 48 divisors (see below), whose sum is σ = 52261386240. Its totient is φ = 6684297120.

The previous prime is 20105427143. The next prime is 20105427233. The reversal of 20105427204 is 40272450102.

20105427204 is a `hidden beast` number, since 20 + 10 + 5 + 427 + 204 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201667 + ... + 284394.

It is an arithmetic number, because the mean of its divisors is an integer number (1088778880).

Almost surely, 2^20105427204 is an apocalyptic number.

It is an amenable number.

20105427204 is an abundant number, since it is smaller than the sum of its proper divisors (32155959036).

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

20105427204 is a wasteful number, since it uses less digits than its factorization.

20105427204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486457 (or 486449 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

Adding to 20105427204 its reverse (40272450102), we get a palindrome (60377877306).

The spelling of 20105427204 in words is "twenty billion, one hundred five million, four hundred twenty-seven thousand, two hundred four".