21937701374694 has 256 divisors, whose sum is σ = 59314827264000. Its totient is φ = 5870778600960.

The previous prime is 21937701374689. The next prime is 21937701374707. The reversal of 21937701374694 is 49647310773912.

21937701374694 is a `hidden beast` number, since 2 + 1 + 9 + 37 + 7 + 0 + 137 + 469 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 240544227 + ... + 240635409.

It is an arithmetic number, because the mean of its divisors is an integer number (231698544000).

Almost surely, 2^{21937701374694} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21937701374694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29657413632000).

21937701374694 is an abundant number, since it is smaller than the sum of its proper divisors (37377125889306).

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

21937701374694 is a wasteful number, since it uses less digits than its factorization.

21937701374694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91600 (or 91594 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 63.

The spelling of 21937701374694 in words is "twenty-one trillion, nine hundred thirty-seven billion, seven hundred one million, three hundred seventy-four thousand, six hundred ninety-four".