18936969155 has 32 divisors (see below), whose sum is σ = 25634036736. Its totient is φ = 13325076864.

The previous prime is 18936969131. The next prime is 18936969167. The reversal of 18936969155 is 55196963981.

It is a happy number.

It is not a de Polignac number, because 18936969155 - 2⁶ = 18936969091 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 369104 + ... + 417266.

It is an arithmetic number, because the mean of its divisors is an integer number (801063648).

Almost surely, 2^18936969155 is an apocalyptic number.

18936969155 is a deficient number, since it is larger than the sum of its proper divisors (6697067581).

18936969155 is a wasteful number, since it uses less digits than its factorization.

18936969155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48467.

The product of its digits is 15746400, while the sum is 62.

The spelling of 18936969155 in words is "eighteen billion, nine hundred thirty-six million, nine hundred sixty-nine thousand, one hundred fifty-five".