21230611672 has 16 divisors (see below), whose sum is σ = 39872986560. Its totient is φ = 10597815264.

The previous prime is 21230611669. The next prime is 21230611673. The reversal of 21230611672 is 27611603212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230611673) 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, 2181163 + ... + 2190874.

It is an arithmetic number, because the mean of its divisors is an integer number (2492061660).

Almost surely, 2^21230611672 is an apocalyptic number.

It is an amenable number.

21230611672 is a deficient number, since it is larger than the sum of its proper divisors (18642374888).

21230611672 is a wasteful number, since it uses less digits than its factorization.

21230611672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372650 (or 4372646 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 21230611672 in words is "twenty-one billion, two hundred thirty million, six hundred eleven thousand, six hundred seventy-two".