18941650456 has 8 divisors (see below), whose sum is σ = 35515594620. Its totient is φ = 9470825224.

The previous prime is 18941650423. The next prime is 18941650477. The reversal of 18941650456 is 65405614981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18941650456² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1183853146 + ... + 1183853161.

Almost surely, 2^18941650456 is an apocalyptic number.

It is an amenable number.

18941650456 is a deficient number, since it is larger than the sum of its proper divisors (16573944164).

18941650456 is a wasteful number, since it uses less digits than its factorization.

18941650456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367706313 (or 2367706309 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 18941650456 in words is "eighteen billion, nine hundred forty-one million, six hundred fifty thousand, four hundred fifty-six".