21972348068 has 24 divisors (see below), whose sum is σ = 44154959520. Its totient is φ = 9461776320.

The previous prime is 21972348067. The next prime is 21972348103. The reversal of 21972348068 is 86084327912.

It is not an unprimeable number, because it can be changed into a prime (21972348067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13140521 + ... + 13142192.

It is an arithmetic number, because the mean of its divisors is an integer number (1839789980).

Almost surely, 2^21972348068 is an apocalyptic number.

It is an amenable number.

21972348068 is an abundant number, since it is smaller than the sum of its proper divisors (22182611452).

21972348068 is a wasteful number, since it uses less digits than its factorization.

21972348068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282747 (or 26282745 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 21972348068 in words is "twenty-one billion, nine hundred seventy-two million, three hundred forty-eight thousand, sixty-eight".