20012304555 has 32 divisors (see below), whose sum is σ = 35620545600. Its totient is φ = 10660294656.

The previous prime is 20012304551. The next prime is 20012304583. The reversal of 20012304555 is 55540321002.

It is a happy number.

20012304555 is a `hidden beast` number, since 200 + 1 + 2 + 3 + 0 + 455 + 5 = 666.

It is not a de Polignac number, because 20012304555 - 2² = 20012304551 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20012304551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22507 + ... + 201323.

It is an arithmetic number, because the mean of its divisors is an integer number (1113142050).

Almost surely, 2^20012304555 is an apocalyptic number.

20012304555 is a deficient number, since it is larger than the sum of its proper divisors (15608241045).

20012304555 is a wasteful number, since it uses less digits than its factorization.

20012304555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179660 (or 179654 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 20012304555 its reverse (55540321002), we get a palindrome (75552625557).

The spelling of 20012304555 in words is "twenty billion, twelve million, three hundred four thousand, five hundred fifty-five".