18033396477 has 16 divisors (see below), whose sum is σ = 24890515968. Its totient is φ = 11601469440.

The previous prime is 18033396449. The next prime is 18033396497. The reversal of 18033396477 is 77469333081.

It is not a de Polignac number, because 18033396477 - 2¹² = 18033392381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033396497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241828 + ... + 307485.

It is an arithmetic number, because the mean of its divisors is an integer number (1555657248).

Almost surely, 2^18033396477 is an apocalyptic number.

It is an amenable number.

18033396477 is a deficient number, since it is larger than the sum of its proper divisors (6857119491).

18033396477 is a wasteful number, since it uses less digits than its factorization.

18033396477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549700.

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 18033396477 in words is "eighteen billion, thirty-three million, three hundred ninety-six thousand, four hundred seventy-seven".