20122543455 has 64 divisors (see below), whose sum is σ = 38517866496. Its totient is φ = 8776656000.

The previous prime is 20122543451. The next prime is 20122543477. The reversal of 20122543455 is 55434522102.

It is a happy number.

It is not a de Polignac number, because 20122543455 - 2² = 20122543451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122543451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 187570 + ... + 274640.

It is an arithmetic number, because the mean of its divisors is an integer number (601841664).

Almost surely, 2^20122543455 is an apocalyptic number.

20122543455 is a deficient number, since it is larger than the sum of its proper divisors (18395323041).

20122543455 is a wasteful number, since it uses less digits than its factorization.

20122543455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87188.

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 20122543455 in words is "twenty billion, one hundred twenty-two million, five hundred forty-three thousand, four hundred fifty-five".