18904846477 has 8 divisors (see below), whose sum is σ = 20626988832. Its totient is φ = 17183290800.

The previous prime is 18904846469. The next prime is 18904846483. The reversal of 18904846477 is 77464840981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18904846477 - 2³ = 18904846469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18904846577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77883 + ... + 209464.

It is an arithmetic number, because the mean of its divisors is an integer number (2578373604).

Almost surely, 2^18904846477 is an apocalyptic number.

It is an amenable number.

18904846477 is a deficient number, since it is larger than the sum of its proper divisors (1722142355).

18904846477 is a wasteful number, since it uses less digits than its factorization.

18904846477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293339.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 18904846477 in words is "eighteen billion, nine hundred four million, eight hundred forty-six thousand, four hundred seventy-seven".