21893929614 has 64 divisors (see below), whose sum is σ = 50250977280. Its totient is φ = 7058573280.

The previous prime is 21893929591. The next prime is 21893929643. The reversal of 21893929614 is 41692939812.

21893929614 is a `hidden beast` number, since 2 + 18 + 9 + 3 + 9 + 2 + 9 + 614 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4947807 + ... + 4952229.

It is an arithmetic number, because the mean of its divisors is an integer number (785171520).

Almost surely, 2^21893929614 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21893929614, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25125488640).

21893929614 is an abundant number, since it is smaller than the sum of its proper divisors (28357047666).

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

21893929614 is a wasteful number, since it uses less digits than its factorization.

21893929614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7422 (or 7416 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 21893929614 in words is "twenty-one billion, eight hundred ninety-three million, nine hundred twenty-nine thousand, six hundred fourteen".