18961004244 has 48 divisors (see below), whose sum is σ = 54452117888. Its totient is φ = 5000704128.

The previous prime is 18961004239. The next prime is 18961004291. The reversal of 18961004244 is 44240016981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8680687 + ... + 8682870.

Almost surely, 2^18961004244 is an apocalyptic number.

18961004244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18961004244 is an abundant number, since it is smaller than the sum of its proper divisors (35491113644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18961004244 is a wasteful number, since it uses less digits than its factorization.

18961004244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17363584 (or 17363582 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 18961004244 in words is "eighteen billion, nine hundred sixty-one million, four thousand, two hundred forty-four".