21569196480 has 224 divisors, whose sum is σ = 74108633088. Its totient is φ = 5283532800.

The previous prime is 21569196457. The next prime is 21569196491. The reversal of 21569196480 is 8469196512.

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, 2629185 + ... + 2637375.

It is an arithmetic number, because the mean of its divisors is an integer number (330842112).

Almost surely, 2^21569196480 is an apocalyptic number.

21569196480 is a gapful number since it is divisible by the number (20) 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 21569196480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37054316544).

21569196480 is an abundant number, since it is smaller than the sum of its proper divisors (52539436608).

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

21569196480 is a wasteful number, since it uses less digits than its factorization.

21569196480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435 (or 8425 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 21569196480 in words is "twenty-one billion, five hundred sixty-nine million, one hundred ninety-six thousand, four hundred eighty".