21411794880 has 224 divisors, whose sum is σ = 86327162880. Its totient is φ = 4894110720.

The previous prime is 21411794867. The next prime is 21411794909. The reversal of 21411794880 is 8849711412.

It is a tau number, because it is divible by the number of its divisors (224).

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 31 ways as a sum of consecutive naturals, for example, 116536 + ... + 237495.

It is an arithmetic number, because the mean of its divisors is an integer number (385389120).

Almost surely, 2^21411794880 is an apocalyptic number.

21411794880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21411794880 is an abundant number, since it is smaller than the sum of its proper divisors (64915368000).

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

21411794880 is a wasteful number, since it uses less digits than its factorization.

21411794880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354064 (or 354048 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 21411794880 in words is "twenty-one billion, four hundred eleven million, seven hundred ninety-four thousand, eight hundred eighty".