21376658970 has 96 divisors (see below), whose sum is σ = 57677780160. Its totient is φ = 5696490240.

The previous prime is 21376658951. The next prime is 21376658983. The reversal of 21376658970 is 7985667312.

21376658970 is a `hidden beast` number, since 21 + 37 + 6 + 6 + 589 + 7 + 0 = 666.

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

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 47 ways as a sum of consecutive naturals, for example, 5681890 + ... + 5685650.

It is an arithmetic number, because the mean of its divisors is an integer number (600810210).

Almost surely, 2^21376658970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21376658970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28838890080).

21376658970 is an abundant number, since it is smaller than the sum of its proper divisors (36301121190).

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

21376658970 is a wasteful number, since it uses less digits than its factorization.

21376658970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 21376658970 in words is "twenty-one billion, three hundred seventy-six million, six hundred fifty-eight thousand, nine hundred seventy".