18941402880 has 504 divisors, whose sum is σ = 69489197568. Its totient is φ = 4942798848.

The previous prime is 18941402849. The next prime is 18941402891. The reversal of 18941402880 is 8820414981.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 49455169 + ... + 49455551.

It is an arithmetic number, because the mean of its divisors is an integer number (137875392).

Almost surely, 2^18941402880 is an apocalyptic number.

18941402880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18941402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34744598784).

18941402880 is an abundant number, since it is smaller than the sum of its proper divisors (50547794688).

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

18941402880 is an frugal number, since it uses more digits than its factorization.

18941402880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

It can be divided in two parts, 18941 and 402880, that added together give a triangular number (421821 = T₉₁₈).

The spelling of 18941402880 in words is "eighteen billion, nine hundred forty-one million, four hundred two thousand, eight hundred eighty".