21260195548 has 12 divisors (see below), whose sum is σ = 37285014312. Its totient is φ = 10607334320.

The previous prime is 21260195507. The next prime is 21260195549. The reversal of 21260195548 is 84559106212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260195549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5688763 + ... + 5692498.

It is an arithmetic number, because the mean of its divisors is an integer number (3107084526).

Almost surely, 2^21260195548 is an apocalyptic number.

It is an amenable number.

21260195548 is a deficient number, since it is larger than the sum of its proper divisors (16024818764).

21260195548 is a wasteful number, since it uses less digits than its factorization.

21260195548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11381732 (or 11381730 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 21260195548 in words is "twenty-one billion, two hundred sixty million, one hundred ninety-five thousand, five hundred forty-eight".