20124552155 has 16 divisors (see below), whose sum is σ = 24810814080. Its totient is φ = 15659044992.

The previous prime is 20124552137. The next prime is 20124552191. The reversal of 20124552155 is 55125542102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20124552155 - 2⁸ = 20124551899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559577 + ... + 594453.

It is an arithmetic number, because the mean of its divisors is an integer number (1550675880).

Almost surely, 2^20124552155 is an apocalyptic number.

20124552155 is a deficient number, since it is larger than the sum of its proper divisors (4686261925).

20124552155 is a wasteful number, since it uses less digits than its factorization.

20124552155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38038.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 20124552155 in words is "twenty billion, one hundred twenty-four million, five hundred fifty-two thousand, one hundred fifty-five".