18941259616 has 24 divisors (see below), whose sum is σ = 37632727440. Its totient is φ = 9383741568.

The previous prime is 18941259593. The next prime is 18941259629. The reversal of 18941259616 is 61695214981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2711716 + ... + 2718691.

It is an arithmetic number, because the mean of its divisors is an integer number (1568030310).

Almost surely, 2^18941259616 is an apocalyptic number.

18941259616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18941259616 is a deficient number, since it is larger than the sum of its proper divisors (18691467824).

18941259616 is a wasteful number, since it uses less digits than its factorization.

18941259616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430526 (or 5430518 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The spelling of 18941259616 in words is "eighteen billion, nine hundred forty-one million, two hundred fifty-nine thousand, six hundred sixteen".