21948700016 has 20 divisors (see below), whose sum is σ = 42760560024. Its totient is φ = 10913716800.

The previous prime is 21948700001. The next prime is 21948700019. The reversal of 21948700016 is 61000784912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21948700019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3786590 + ... + 3792381.

Almost surely, 2^21948700016 is an apocalyptic number.

It is an amenable number.

21948700016 is a deficient number, since it is larger than the sum of its proper divisors (20811860008).

21948700016 is a wasteful number, since it uses less digits than its factorization.

21948700016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7579160 (or 7579154 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 21948700016 in words is "twenty-one billion, nine hundred forty-eight million, seven hundred thousand, sixteen".