21198786741 has 12 divisors (see below), whose sum is σ = 33404148960. Its totient is φ = 12847749480.

The previous prime is 21198786703. The next prime is 21198786757. The reversal of 21198786741 is 14768789112.

It is not a de Polignac number, because 21198786741 - 2¹⁵ = 21198753973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21198786041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107064481 + ... + 107064678.

It is an arithmetic number, because the mean of its divisors is an integer number (2783679080).

Almost surely, 2^21198786741 is an apocalyptic number.

It is an amenable number.

21198786741 is a deficient number, since it is larger than the sum of its proper divisors (12205362219).

21198786741 is a wasteful number, since it uses less digits than its factorization.

21198786741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214129176 (or 214129173 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The spelling of 21198786741 in words is "twenty-one billion, one hundred ninety-eight million, seven hundred eighty-six thousand, seven hundred forty-one".