21442023394148 has 24 divisors (see below), whose sum is σ = 43061988904704. Its totient is φ = 9151308144000.

The previous prime is 21442023394147. The next prime is 21442023394201. The reversal of 21442023394148 is 84149332024412.

It is not an unprimeable number, because it can be changed into a prime (21442023394147) 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, 1588762028 + ... + 1588775523.

It is an arithmetic number, because the mean of its divisors is an integer number (1794249537696).

Almost surely, 2^{21442023394148} is an apocalyptic number.

21442023394148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21442023394148 is an abundant number, since it is smaller than the sum of its proper divisors (21619965510556).

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

21442023394148 is a wasteful number, since it uses less digits than its factorization.

21442023394148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177537803 (or 3177537801 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 21442023394148 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, three hundred ninety-four thousand, one hundred forty-eight".