20555040142 has 64 divisors (see below), whose sum is σ = 40035502080. Its totient is φ = 7686233856.

The previous prime is 20555040137. The next prime is 20555040179. The reversal of 20555040142 is 24104055502.

It is a self number, because there is not a number n which added to its sum of digits gives 20555040142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1573803 + ... + 1586809.

It is an arithmetic number, because the mean of its divisors is an integer number (625554720).

Almost surely, 2^20555040142 is an apocalyptic number.

20555040142 is a deficient number, since it is larger than the sum of its proper divisors (19480461938).

20555040142 is a wasteful number, since it uses less digits than its factorization.

20555040142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13505.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 20555040142 its reverse (24104055502), we get a palindrome (44659095644).

The spelling of 20555040142 in words is "twenty billion, five hundred fifty-five million, forty thousand, one hundred forty-two".