21128047614 has 192 divisors, whose sum is σ = 52064812800. Its totient is φ = 6395977728.

The previous prime is 21128047609. The next prime is 21128047621. The reversal of 21128047614 is 41674082112.

It is a happy number.

21128047614 is a `hidden beast` number, since 2 + 11 + 28 + 0 + 4 + 7 + 614 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68820849 + ... + 68821155.

It is an arithmetic number, because the mean of its divisors is an integer number (271170900).

Almost surely, 2^21128047614 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21128047614, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26032406400).

21128047614 is an abundant number, since it is smaller than the sum of its proper divisors (30936765186).

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

21128047614 is a wasteful number, since it uses less digits than its factorization.

21128047614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 21128047614 in words is "twenty-one billion, one hundred twenty-eight million, forty-seven thousand, six hundred fourteen".