21953196048 has 40 divisors (see below), whose sum is σ = 64814198848. Its totient is φ = 6272341632.

The previous prime is 21953196037. The next prime is 21953196061. The reversal of 21953196048 is 84069135912.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 21953195988 and 21953196006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32668111 + ... + 32668782.

Almost surely, 2^21953196048 is an apocalyptic number.

21953196048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21953196048 is an abundant number, since it is smaller than the sum of its proper divisors (42861002800).

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

21953196048 is a wasteful number, since it uses less digits than its factorization.

21953196048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65336911 (or 65336905 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 21953196048 in words is "twenty-one billion, nine hundred fifty-three million, one hundred ninety-six thousand, forty-eight".